ASTERWEB Blog

5Feb/16Off

AST-2016-002: File descriptor exhaustion in chan_sip

               Asterisk Project Security Advisory - AST-2016-002

Product Asterisk
Summary File descriptor exhaustion in chan_sip
Nature of Advisory Denial of Service
Susceptibility Remote Unauthenticated Sessions
Severity Minor
Exploits Known Yes
Reported On September 17, 2015
Reported By Alexander Traud
Posted On February 3, 2016
Last Updated On February 3, 2016
Advisory Contact Richard Mudgett <rmudgett AT digium DOT com>
CVE Name Pending

Description Setting the sip.conf timert1 value to a value higher than
1245 can cause an integer overflow and result in large
retransmit timeout times. These large timeout values hold
system file descriptors hostage and can cause the system to
run out of file descriptors.

Resolution Setting the sip.conf timert1 value to 1245 or lower will not
exhibit the vulnerability. The default timert1 value is 500.
Asterisk has been patched to detect the integer overflow and
calculate the previous retransmission timer value.

Affected Versions
Product Release
Series
Asterisk Open Source 1.8.x All versions
Asterisk Open Source 11.x All versions
Asterisk Open Source 12.x All versions
Asterisk Open Source 13.x All versions
Certified Asterisk 1.8.28 All versions
Certified Asterisk 11.6 All versions
Certified Asterisk 13.1 All versions

Corrected In
Product Release
Asterisk Open Source 11.21.1, 13.7.1
Certified Asterisk 11.6-cert12, 13.1-cert3

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2016-002-1.8.28.diff Certified
Asterisk
1.8.28
http://downloads.asterisk.org/pub/security/AST-2016-002-11.6.diff Certified
Asterisk
11.6
http://downloads.asterisk.org/pub/security/AST-2016-002-13.1.diff Certified
Asterisk
13.1
http://downloads.asterisk.org/pub/security/AST-2016-002-1.8.diff Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2016-002-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2016-002-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2016-002-13.diff Asterisk
13

Links https://issues.asterisk.org/jira/browse/ASTERISK-25397

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2016-002.pdf and
http://downloads.digium.com/pub/security/AST-2016-002.html

5Feb/16Off

AST-2016-001: BEAST vulnerability in HTTP server

               Asterisk Project Security Advisory - AST-2016-001

Product Asterisk
Summary BEAST vulnerability in HTTP server
Nature of Advisory Unauthorized data disclosure due to
man-in-the-middle attack
Susceptibility Remote unauthenticated sessions
Severity Minor
Exploits Known Yes
Reported On 04/15/15
Reported By Alex A. Welzl
Posted On 02/03/16
Last Updated On February 3, 2016
Advisory Contact Joshua Colp <jcolp AT digium DOT com>
CVE Name Pending

Description The Asterisk HTTP server currently has a default
configuration which allows the BEAST vulnerability to be
exploited if the TLS functionality is enabled. This can
allow a man-in-the-middle attack to decrypt data passing
through it.

Resolution Additional configuration options have been added to Asterisk
which allow configuration of the HTTP server to not be
susceptible to the BEAST vulnerability. These include
options to confirm the permitted ciphers, to control what
TLS protocols are allowed, and to use server cipher
preference order instead of client preference order. The
default configuration has also been changed for the HTTP
server to use a configuration which is not susceptible to
the BEAST vulnerability.

Affected Versions
Product Release
Series
Asterisk Open Source 1.8.x All Versions
Asterisk Open Source 11.x All Versions
Asterisk Open Source 12.x All Versions
Asterisk Open Source 13.x All Versions
Certified Asterisk 1.8.28 All Versions
Certified Asterisk 11.6 All Versions
Certified Asterisk 13.1 All Versions

Corrected In
Product Release
Asterisk Open Source 11.21.1, 13.7.1
Certified Asterisk 11.6-cert12, 13.1-cert3

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2016-001-1.8.28.diff Certified
Asterisk
1.8.28
http://downloads.asterisk.org/pub/security/AST-2016-001-11.6.diff Certified
Asterisk
11.6
http://downloads.asterisk.org/pub/security/AST-2016-001-13.1.diff Certified
Asterisk
13.1
http://downloads.asterisk.org/pub/security/AST-2016-001-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2016-001-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2016-001-13.diff Asterisk
13

Links https://issues.asterisk.org/jira/browse/ASTERISK-24972

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2016-001.pdf and
http://downloads.digium.com/pub/security/AST-2016-001.html

5Feb/16Off

Rilasciati Asterisk 11.6-cert12, 11.21.1, 13.1-cert3, 13.7.1 (Security Release)

Il giorno 15 gennaio 2016, il Team di Sviluppo di Asterisk ha annunciato il rilascio di Asterisk 11.6-cert12, 11.21.1, 13.1-cert3, 13.7.1.

Dal post originale:

The Asterisk Development Team has announced security releases for Certified
Asterisk 11.6 and 13.1 and Asterisk 11 and 13. The available security releases
are released as versions 11.6-cert12, 11.21.1, 13.1-cert3, and 13.7.1.

The release of these versions resolves the following security vulnerabilities:

* AST-2016-001: BEAST vulnerability in HTTP server

The Asterisk HTTP server currently has a default configuration which allows
the BEAST vulnerability to be exploited if the TLS functionality is enabled.
This can allow a man-in-the-middle attack to decrypt data passing through it.

* AST-2016-002: File descriptor exhaustion in chan_sip

Setting the sip.conf timert1 value to a value higher than 1245 can cause an
integer overflow and result in large retransmit timeout times. These large
timeout values hold system file descriptors hostage and can cause the system
to run out of file descriptors.

* AST-2016-003: Remote crash vulnerability receiving UDPTL FAX data.

If no UDPTL packets are lost there is no problem. However, a lost packet
causes Asterisk to use the available error correcting redundancy packets. If
those redundancy packets have zero length then Asterisk uses an uninitialized
buffer pointer and length value which can cause invalid memory accesses later
when the packet is copied.

For a full list of changes in the current releases, please see the ChangeLogs:

http://downloads.asterisk.org/pub/telephony/certified-asterisk/releases/ChangeLog-certified-11.6-cert12
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-11.21.1
http://downloads.asterisk.org/pub/telephony/certified-asterisk/releases/ChangeLog-certified-13.1-cert3
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-13.7.1

The security advisories are available at:

* http://downloads.asterisk.org/pub/security/AST-2016-001.pdf
* http://downloads.asterisk.org/pub/security/AST-2016-002.pdf
* http://downloads.asterisk.org/pub/security/AST-2016-003.pdf

9Apr/15Off

AST-2015-003: TLS Certificate Common name NULL byte exploit

Il giorno 08 aprile 2015, l'Asterisk Security Team ha rilasciato l'annunciato di sicurezza visualizzabile da questo link:

http://lists.digium.com/pipermail/asterisk-announce/2015-April/000600.html

15Dic/14Off

AST-2014-019: Remote Crash Vulnerability in WebSocket Server

Il giorno 10 dicembre 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio di AST-2014-019: Remote Crash Vulnerability in WebSocket Server.

Dal post originale:

sterisk Project Security Advisory - AST-2014-019

Product Asterisk
Summary Remote Crash Vulnerability in WebSocket Server
Nature of Advisory Denial of Service
Susceptibility Remote Unauthenticated Sessions
Severity Moderate
Exploits Known No
Reported On 30 October 2014
Reported By Badalian Vyacheslav
Posted On 10 December 2014
Last Updated On December 10, 2014
Advisory Contact Joshua Colp
CVE Name

Description When handling a WebSocket frame the res_http_websocket
module dynamically changes the size of the memory used to
allow the provided payload to fit. If a payload length of
zero was received the code would incorrectly attempt to
resize to zero. This operation would succeed and end up
freeing the memory but be treated as a failure. When the
session was subsequently torn down this memory would get
freed yet again causing a crash.

Users of the WebSocket functionality also did not take into
account that provided text frames are not guaranteed to be
NULL terminated. This has been fixed in chan_sip and
chan_pjsip in the applicable versions.

Resolution Ensure the built-in HTTP server is disabled, upgrade to a
version listed below, or apply the applicable patch.

The change ensures that res_http_websocket does not treat
the freeing of memory when a payload length of zero is
received as fatal.

Affected Versions
Product Release
Series
Certified Asterisk 11.6 All versions
Asterisk Open Source 11.x All versions
Asterisk Open Source 12.x All versions
Asterisk Open Source 13.x All versions

Corrected In
Product Release
Certified Asterisk 11.6-cert9
Asterisk Open Source 11.14.2, 12.7.2, 13.0.2

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-019-11.6.diff Certified
Asterisk
11.6
http://downloads.asterisk.org/pub/security/AST-2014-019-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2014-019-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2014-019-13.diff Asterisk
13

Links https://issues.asterisk.org/jira/browse/ASTERISK-24472

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-019.pdf and
http://downloads.digium.com/pub/security/AST-2014-019.html

21Ott/14Off

AST-2014-011: Asterisk Susceptibility to POODLE Vulnerability

Il giorno 20 ottobre 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio di AST-2014-011: Asterisk Susceptibility to POODLE Vulnerability.

Dal post originale:
Asterisk Project Security Advisory - AST-2014-011

Product Asterisk
Summary Asterisk Susceptibility to POODLE Vulnerability
Nature of Advisory Unauthorized Data Disclosure
Susceptibility Remote Unauthenticated Sessions
Severity Medium
Exploits Known No
Reported On 16 October 2014
Reported By abelbeck
Posted On 20 October 2014
Last Updated On October 20, 2014
Advisory Contact Matt Jordan
CVE Name CVE-2014-3566

Description The POODLE vulnerability - described under CVE-2014-3566 - is
described at
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3566.
This advisory describes the Asterisk's project susceptibility
to this vulnerability.

The POODLE vulnerability consists of two issues:

1) A vulnerability in the SSL protocol version 3.0. This
vulnerability has no known solution.

2) The ability to force a fallback to SSLv3 when a TLS
connection is negotiated.

Asterisk is susceptible to both portions of the vulnerability
in different places.

1) The res_jabber and res_xmpp module both use SSLv3
exclusively, and are hence susceptible to POODLE.

2) The core TLS handling, used by the chan_sip channel driver,
Asterisk Manager Interface (AMI), and the Asterisk HTTP
server, defaults to allowing SSLv3/SSLv2 fallback. This allows
a MITM to potentially force a connection to fallback to SSLv3,
exposing it to the POODLE vulnerability.

Resolution Asterisk has been patched such that it no longer uses SSLv3
for the res_jabber/res_xmpp modules. Additionally, when the
encryption method is not specified, the default handling in
the TLS core no longer allows for a fallback to SSLv3 or
SSLv2.

1) Users of Asterisk's res_jabber or res_xmpp modules should
upgrade to the versions of Asterisk specified in this
advisory.

2) Users of Asterisk's chan_sip channel driver, AMI, and
HTTP server may set the "tlsclientmethod" or
"sslclientmethod" to "tlsv1" to force TLSv1 as the only
allowed encryption method. Alternatively, they may also
upgrade to the versions of Asterisk specified in this
advisory. Users of Asterisk are encouraged to NOT specify
"sslv2" or "sslv3". Doing so will now emit a WARNING.

Affected Versions
Product Release
Series
Asterisk Open Source 1.8.x All versions
Asterisk Open Source 11.x All versions
Asterisk Open Source 12.x All versions
Certified Asterisk 1.8.28 All versions
Certified Asterisk 11.6 All versions

Corrected In
Product Release
Asterisk Open Source 1.8.31.1, 11.13.1, 12.6.1
Certified Asterisk 1.8.28-cert2, 11.6-cert7

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-011-1.8.diff Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2014-011-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2014-011-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2014-011-1.8.28.diff Certified
Asterisk
1.8.28
http://downloads.asterisk.org/pub/security/AST-2014-011-11.6.diff Certified
Asterisk
11.6

Links https://issues.asterisk.org/jira/browse/ASTERISK-24425

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-011.pdf and
http://downloads.digium.com/pub/security/AST-2014-011.html

Revision History
Date Editor Revisions Made
October 19 Matt Jordan Initial Revision

21Ott/14Off

Rilasciate Asterisk 1.8.28-cert2, 1.8.31.1, 11.6-cert7, 11.13.1, 12.6.1, 13.0.0-beta3 Now Available (Security Release)

Il giorno 20 ottobre 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio di Asterisk Asterisk 1.8.28-cert2, 1.8.31.1, 11.6-cert7, 11.13.1, 12.6.1, 13.0.0-beta3 Now Available (Security Release).

Dal post originale:
These releases are available for immediate download at
http://downloads.asterisk.org/pub/telephony/asterisk/releases

The release of these versions resolves the following security vulnerability:

* AST-2014-011: Asterisk Susceptibility to POODLE Vulnerability

Asterisk is susceptible to the POODLE vulnerability in two ways:
1) The res_jabber and res_xmpp module both use SSLv3 exclusively for their
encrypted connections.
2) The core TLS handling in Asterisk, which is used by the chan_sip channel
driver, Asterisk Manager Interface (AMI), and Asterisk HTTP Server, by
default allow a TLS connection to fallback to SSLv3. This allows for a
MITM to potentially force a connection to fallback to SSLv3, exposing it
to the POODLE vulnerability.

These issues have been resolved in the versions released in conjunction with
this security advisory.

For more information about the details of this vulnerability, please read
security advisory AST-2014-011, which was released at the same time as this
announcement.

For a full list of changes in the current releases, please see the ChangeLogs:

http://downloads.asterisk.org/pub/telephony/certified-asterisk/releases/ChangeLog-1.8.28-cert2
http://downloads.asterisk.org/pub/telephony/certified-asterisk/releases/ChangeLog-11.6-cert7
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.8.31.1
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-11.13.1
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-12.6.1
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-13.0.0-beta3

The security advisory is available at:

http://downloads.asterisk.org/pub/security/AST-2014-011.pdf

20Set/14Off

Remote crash when handling out of call message in certain dialplan configurations

Il giorno 20 settembre 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio di Asterisk 13.0.0-beta2.

Dal post originale:

Asterisk Project Security Advisory - AST-2014-010

Product Asterisk
Summary Remote crash when handling out of call message in
certain dialplan configurations
Nature of Advisory Remotely triggered crash of Asterisk
Susceptibility Remote authenticated sessions
Severity Minor
Exploits Known No
Reported On 05 September 2014
Reported By Philippe Lindheimer
Posted On 18 September 2014
Last Updated On September 18, 2014
Advisory Contact Matt Jordan
CVE Name Pending

Description When an out of call message - delivered by either the SIP
or PJSIP channel driver or the XMPP stack - is handled in
Asterisk, a crash can occur if the channel servicing the
message is sent into the ReceiveFax dialplan application
while using the res_fax_spandsp module.

Note that this crash does not occur when using the
res_fax_digium module.

While this crash technically occurs due to a configuration
issue, as attempting to receive a fax from a channel driver
that only contains textual information will never succeed,
the likelihood of having it occur is sufficiently high as
to warrant this advisory.

Resolution The fax family of applications have been updated to handle
the Message channel driver correctly. Users using the fax
family of applications along with the out of call text
messaging features are encouraged to upgrade their versions
of Asterisk to the versions specified in this security
advisory.

Additionally, users of Asterisk are encouraged to use a
separate dialplan context to process text messages. This
avoids issues where the Message channel driver is passed to
dialplan applications that assume a media stream is
available. Note that the various channel drivers and stacks
provide such an option; an example being the SIP channel
driver's outofcall_message_context option.

Affected Versions
Product Release
Series
Asterisk Open Source 11.x All versions
Asterisk Open Source 12.x All versions
Certified Asterisk 11.6 All versions

Corrected In
Product Release
Asterisk Open Source 11.12.1, 12.5.1
Certified Asterisk 11.6-cert6

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-010-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2014-010-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2014-010-11.6.diff Certified
Asterisk
11.6

Links https://issues.asterisk.org/jira/browse/ASTERISK-24301

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-010.pdf and
http://downloads.digium.com/pub/security/AST-2014-010.html

Revision History
Date Editor Revisions Made
September 18 Matt Jordan Initial Draft

20Set/14Off

AST-2014-009: Remote crash based on malformed SIP subscription requests

Il giorno 20 settembre 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio di Asterisk 13.0.0-beta2.

Dal post originale:

Asterisk Project Security Advisory - AST-2014-009

Product Asterisk
Summary Remote crash based on malformed SIP subscription
requests
Nature of Advisory Remotely triggered crash of Asterisk
Susceptibility Remote authenticated sessions
Severity Major
Exploits Known No
Reported On 30 July, 2014
Reported By Mark Michelson
Posted On 18 September, 2014
Last Updated On September 18, 2014
Advisory Contact Mark Michelson
CVE Name Pending

Description It is possible to trigger a crash in Asterisk by sending a
SIP SUBSCRIBE request with unexpected mixes of headers for
a given event package. The crash occurs because Asterisk
allocates data of one type at one layer and then interprets
the data as a separate type at a different layer. The crash
requires that the SUBSCRIBE be sent from a configured
endpoint, and the SUBSCRIBE must pass any authentication
that has been configured.

Note that this crash is Asterisk's PJSIP-based
res_pjsip_pubsub module and not in the old chan_sip module.

Resolution Type-safety has been built into the pubsub API where it
previously was absent. A test has been added to the
testsuite that previously would have triggered the crash.

Affected Versions
Product Release
Series
Asterisk Open Source 1.8.x Unaffected
Asterisk Open Source 11.x Unaffected
Asterisk Open Source 12.x 12.1.0 and up
Certified Asterisk 1.8.15 Unaffected
Certified Asterisk 11.6 Unaffected

Corrected In
Product Release
Asterisk Open Source 12.5.1

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-009-12.diff Asterisk
12

Links https://issues.asterisk.org/jira/browse/ASTERISK-24136

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-009.pdf and
http://downloads.digium.com/pub/security/AST-2014-009.html

Revision History
Date Editor Revisions Made
19 August, 2014 Mark Michelson Initial version of document

13Giu/14Off

Asterisk Project Security Advisory – AST-2014-008

Il giorno 12 giugno 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio delle securety release per Asterisk: 1.8.15-cert6, 1.8.28.1, 11.6-cert3, 11.10.1, 12.3.1

Dal post originale:

Asterisk Project Security Advisory - AST-2014-008

Product Asterisk
Summary Denial of Service in PJSIP Channel Driver
Subscriptions
Nature of Advisory Denial of Service
Susceptibility Remote authenticated sessions
Severity Moderate
Exploits Known No
Reported On 28 May, 2014
Reported By Mark Michelson
Posted On June 12, 2014
Last Updated On June 12, 2014
Advisory Contact Mark Michelson
CVE Name CVE-2014-4048

Description When a SIP transaction timeout caused a subscription to be
terminated, the action taken by Asterisk was guaranteed to
deadlock the thread on which SIP requests are serviced.

Note that this behavior could only happen on established
subscriptions, meaning that this could only be exploited if
an attacker bypassed authentication and successfully
subscribed to a real resource on the Asterisk server.

Resolution The socket-servicing thread is now no longer capable of
dispatching synchronous tasks to other threads since that
may result in deadlocks.

Affected Versions
Product Release Series
Asterisk Open Source 12.x All versions

Corrected In
Product Release
Asterisk Open Source 12.3.1

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-008-12.diff Asterisk
12

Links https://issues.asterisk.org/jira/browse/ASTERISK-23802

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-008.pdf and
http://downloads.digium.com/pub/security/AST-2014-008.html

13Giu/14Off

Asterisk Project Security Advisory – AST-2014-007

Il giorno 12 giugno 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio delle securety release per Asterisk: 1.8.15-cert6, 1.8.28.1, 11.6-cert3, 11.10.1, 12.3.1

Dal post originale:

Asterisk Project Security Advisory - AST-2014-007

Product Asterisk
Summary Exhaustion of Allowed Concurrent HTTP Connections
Nature of Advisory Denial Of Service
Susceptibility Remote Unauthenticated Sessions
Severity Moderate
Exploits Known No
Reported On May 25, 2014
Reported By Richard Mudgett
Posted On May 9, 2014
Last Updated On June 12, 2014
Advisory Contact Richard Mudgett
CVE Name CVE-2014-4047

Description Establishing a TCP or TLS connection to the configured HTTP
or HTTPS port respectively in http.conf and then not
sending or completing a HTTP request will tie up a HTTP
session. By doing this repeatedly until the maximum number
of open HTTP sessions is reached, legitimate requests are
blocked.

Resolution The patched versions now have a session_inactivity timeout
option in http.conf that defaults to 30000 ms. Users should
upgrade to a corrected version, apply the released patches,
or disable HTTP support.

Affected Versions
Product Release Series
Asterisk Open Source 1.8.x All versions
Asterisk Open Source 11.x All versions
Asterisk Open Source 12.x All versions
Certified Asterisk 1.8.15 All versions
Certified Asterisk 11.6 All versions

Corrected In
Product Release
Asterisk Open Source 1.8.28.1, 11.10.1, 12.3.1
Certified Asterisk 1.8.15-cert6, 11.6-cert3

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-007-1.8.diff Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2014-007-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2014-007-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2014-007-1.8.15.diff Certified
Asterisk
1.8.15
http://downloads.asterisk.org/pub/security/AST-2014-007-11.6.diff Certified
Asterisk
11.6

Links https://issues.asterisk.org/jira/browse/ASTERISK-23673

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-007.pdf and
http://downloads.digium.com/pub/security/AST-2014-007.html

13Giu/14Off

Asterisk Project Security Advisory – AST-2014-006

Il giorno 12 giugno 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio delle securety release per Asterisk: 1.8.15-cert6, 1.8.28.1, 11.6-cert3, 11.10.1, 12.3.1

Dal post originale:

Asterisk Project Security Advisory - AST-2014-006

Product Asterisk
Summary Asterisk Manager User Unauthorized Shell Access
Nature of Advisory Permission Escalation
Susceptibility Remote Authenticated Sessions
Severity Minor
Exploits Known No
Reported On April 9, 2014
Reported By Corey Farrell
Posted On June 12, 2014
Last Updated On June 12, 2014
Advisory Contact Jonathan Rose < jrose AT digium DOT com >
CVE Name CVE-2014-4046

Description Manager users can execute arbitrary shell commands with the
MixMonitor manager action. Asterisk does not require system
class authorization for a manager user to use the
MixMonitor action, so any manager user who is permitted to
use manager commands can potentially execute shell commands
as the user executing the Asterisk process.

Resolution Upgrade to a version with the patch integrated, apply the
patch, or do not allow users who should not have permission
to run shell commands to use AMI.

Affected Versions
Product Release Series
Asterisk Open Source 11.x All
Asterisk Open Source 12.x All
Certified Asterisk 11.6 All

Corrected In
Product Release
Asterisk Open Source 11.10.1, 12.3.1
Certified Asterisk 11.6-cert3

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-006-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2014-006-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2014-006-11.6.diff Certified
Asterisk
11.6

Links https://issues.asterisk.org/jira/browse/ASTERISK-23609

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-006.pdf and
http://downloads.digium.com/pub/security/AST-2014-006.html

13Giu/14Off

Asterisk Project Security Advisory – AST-2014-005

Il giorno 12 giugno 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio delle securety release per Asterisk: 1.8.15-cert6, 1.8.28.1, 11.6-cert3, 11.10.1, 12.3.1

Dal post originale:

Asterisk Project Security Advisory - AST-2014-005

Product Asterisk
Summary Remote Crash in PJSIP Channel Driver's
Publish/Subscribe Framework
Nature of Advisory Denial of Service
Susceptibility Remote Unauthenticated Sessions
Severity Moderate
Exploits Known No
Reported On March 17, 2014
Reported By John Bigelow
Posted On June 12, 2014
Last Updated On June 12, 2014
Advisory Contact Kevin Harwell
CVE Name CVE-2014-4045

Description A remotely exploitable crash vulnerability exists in the
PJSIP channel driver's pub/sub framework. If an attempt is
made to unsubscribe when not currently subscribed and the
endpoint's "sub_min_expiry" is set to zero, Asterisk tries
to create an expiration timer with zero seconds, which is
not allowed, so an assertion raised.

Resolution Upgrade to a version with the patch integrated, apply the
patch, or make sure the "sub_min_expiry" endpoint
configuration option is greater than zero.

Affected Versions
Product Release Series
Asterisk Open Source 12.x All

Corrected In
Product Release
Asterisk Open Source 12.x 12.3.1

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-005-12.diff Asterisk
12

Links https://issues.asterisk.org/jira/browse/ASTERISK-23489

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-005.pdf and
http://downloads.digium.com/pub/security/AST-2014-005.html

13Giu/14Off

Asterisk: Security Release 1.8.15-cert6, 1.8.28.1, 11.6-cert3, 11.10.1, 12.3.1

Il giorno 12 giugno 2014, il Team di Sviluppo di Asterisk ha annunciato il rilascio delle securety release per Asterisk: 1.8.15-cert6, 1.8.28.1, 11.6-cert3, 11.10.1, 12.3.1

Dal post originale:
The release of these versions resolves the following issue:

* AST-2014-007: Denial of Service via Exhaustion of Allowed Concurrent HTTP
Connections

Establishing a TCP or TLS connection to the configured HTTP or HTTPS port
respectively in http.conf and then not sending or completing a HTTP request
will tie up a HTTP session. By doing this repeatedly until the maximum number
of open HTTP sessions is reached, legitimate requests are blocked.

Additionally, the release of 11.6-cert3, 11.10.1, and 12.3.1 resolves the
following issue:

* AST-2014-006: Permission Escalation via Asterisk Manager User Unauthorized
Shell Access

Manager users can execute arbitrary shell commands with the MixMonitor manager
action. Asterisk does not require system class authorization for a manager
user to use the MixMonitor action, so any manager user who is permitted to use
manager commands can potentially execute shell commands as the user executing
the Asterisk process.

Additionally, the release of 12.3.1 resolves the following issues:

* AST-2014-005: Remote Crash in PJSIP Channel Driver's Publish/Subscribe
Framework

A remotely exploitable crash vulnerability exists in the PJSIP channel
driver's pub/sub framework. If an attempt is made to unsubscribe when not
currently subscribed and the endpoint's “sub_min_expiry” is set to zero,
Asterisk tries to create an expiration timer with zero seconds, which is not
allowed, so an assertion raised.

* AST-2014-008: Denial of Service in PJSIP Channel Driver Subscriptions

When a SIP transaction timeout caused a subscription to be terminated, the
action taken by Asterisk was guaranteed to deadlock the thread on which SIP
requests are serviced. Note that this behavior could only happen on
established subscriptions, meaning that this could only be exploited if an
attacker bypassed authentication and successfully subscribed to a real
resource on the Asterisk server.

These issues and their resolutions are described in the security advisories.

For more information about the details of these vulnerabilities, please read
security advisories AST-2014-005, AST-2014-006, AST-2014-007, and AST-2014-008,
which were released at the same time as this announcement.

For a full list of changes in the current releases, please see the ChangeLogs:

http://downloads.asterisk.org/pub/telephony/certified-asterisk/releases/ChangeLog-1.8.15-cert6
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.8.28.1
http://downloads.asterisk.org/pub/telephony/certified-asterisk/releases/ChangeLog-11.6-cert3
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-11.10.1
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-12.3.1

31Ago/120

SICUREZZA: AST-2012-013: ACL rules ignored when placing outbound calls by certain IAX2 users

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