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Asterisk: Multiple vulnerabilities

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201209-15 / asterisk
Release Date September 26, 2012
Latest Revision September 26, 2012: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/asterisk < 1.8.15.1 >= 1.8.15.1 All supported architectures

Related bugreports: #425050, #433750

Synopsis

Multiple vulnerabilities have been found in Asterisk, the worst of which may allow execution of arbitrary code.

2.  Impact Information

Background

Asterisk is an open source telephony engine and toolkit.

Description

Multiple vulnerabilities have been found in Asterisk:

  • An error in manager.c allows shell access (CVE-2012-2186).
  • An error in Asterisk could cause all RTP ports to be exhausted (CVE-2012-3812).
  • A double-free error could occur when two parties attempt to manipulate the same voicemail account simultaneously (CVE-2012-3863).
  • Asterisk does not properly implement certain ACL rules (CVE-2012-4737).

Impact

A remote, authenticated attacker could execute arbitrary code with the privileges of the process, cause a Denial of Service condition, or bypass outbound call restrictions.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Asterisk users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.8.15.1"

4.  References



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Page updated September 26, 2012

Summary: This is a Gentoo Linux Security Advisory

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