AST-2017-006: Shell access command injection in app_minivm

Asterisk Project Security Advisory - AST-2017-006

Product Asterisk
Summary Shell access command injection in app_minivm
Nature of Advisory Unauthorized command execution
Susceptibility Remote Authenticated Sessions
Severity Moderate
Exploits Known No
Reported On July 1, 2017
Reported By Corey Farrell
Posted On
Last Updated On July 11, 2017
Advisory Contact Richard Mudgett
CVE Name

Description The app_minivm module has an “externnotify” program
configuration option that is executed by the MinivmNotify
dialplan application. The application uses the caller-id
name and number as part of a built string passed to the OS
shell for interpretation and execution. Since the caller-id
name and number can come from an untrusted source, a
crafted caller-id name or number allows an arbitrary shell
command injection.

Resolution Patched Asterisk’s app_minivm module to use a different
system call that passes argument strings in an array instead
of having the OS shell determine the application parameter

Affected Versions
Product Release
Asterisk Open Source 11.x All releases
Asterisk Open Source 13.x All releases
Asterisk Open Source 14.x All releases
Certified Asterisk 11.6 All releases
Certified Asterisk 13.13 All releases

Corrected In
Product Release
Asterisk Open Source 11.25.2, 13.17.1, 14.6.1
Certified Asterisk 11.6-cert17, 13.13-cert5

SVN URL Revision Asterisk
11 Asterisk
13 Asterisk
14 Certified
11.6 Certified


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