(Gentoo Issues Fix) Asterisk SRTP Video Support Error Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1026731 |
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SecurityTracker URL: http://securitytracker.com/id/1026731
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CVE Reference:
CVE-2012-0885
(Links to External Site)
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Date: Feb 23 2012
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
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Version(s): 1.8.x, 10.x
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Description:
A vulnerability was reported in Asterisk. A remote user can cause denial of service conditions.
If video support has not been enabled and the res_srtp Asterisk module is loaded on the target system, a remote user can attempt to negotiate a secure video stream to cause Asterisk to crash.
Catalin Sanda reported this vulnerability.
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Impact:
A remote user can cause the target Asterisk service to crash.
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Solution:
Gentoo has issued a fix.
The Gentoo advisory is available at:
http://security.gentoo.org/glsa/glsa-201202-06.xml
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Vendor URL: downloads.asterisk.org/pub/security/AST-2012-001.html (Links to External Site)
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Cause:
Exception handling error
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Underlying OS:
Linux (Gentoo)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Thu, 23 Feb 2012 05:34:31 +0000
Subject: GLSA
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Gentoo Linux Security Advisory GLSA 201202-06
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http://security.gentoo.org/
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Severity: Normal
Title: Asterisk: Denial of Service
Date: February 22, 2012
Bugs: #399507
ID: 201202-06
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Synopsis
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A vulnerability in Asterisk could allow a remote attacker to cause a
Denial of Service condition.
Background
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Asterisk is an open source telephony engine and toolkit.
Affected packages
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Package / Vulnerable / Unaffected
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1 net-misc/asterisk < 1.8.8.2 >= 1.8.8.2
Description
===========
A vulnerability has been found in Asterisk's handling of certain
encrypted streams where the res_srtp module has been loaded but video
support has not been enabled.
Impact
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A remote attacker could send a specially crafted SDP message to the
Asterisk daemon, possibly resulting in a Denial of Service condition.
Workaround
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There is no known workaround at this time.
Resolution
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All Asterisk users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.8.8.2"
References
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[ 1 ] CVE-2012-0885
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0885
Availability
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This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-201202-06.xml
Concerns?
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Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@g.o or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
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Copyright 2012 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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