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AUSCERT External Security Bulletin Redistribution
ESB-2016.0302
Asterisk Project Security Advisories
5 February 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Asterisk
Publisher: Digium
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2011-3389
Reference: ASB-2015.0070
ASB-2015.0009
ASB-2013.0113
ESB-2012.0114
ESB-2011.1033
ESB-2011.1032
ESB-2011.0979
Original Bulletin:
http://downloads.digium.com/pub/security/AST-2016-001.html
http://downloads.digium.com/pub/security/AST-2016-002.html
http://downloads.digium.com/pub/security/AST-2016-003.html
Comment: This bulletin contains three (3) Digium security advisories.
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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
Revision History
Date Editor Revisions Made
3 August, 2015 Joshua Colp Initial creation of document
Asterisk Project Security Advisory - AST-2016-001
Copyright (c) 2015 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
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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
Revision History
Date Editor Revisions Made
September 29, 2015 Richard Mudgett Initial document created
Asterisk Project Security Advisory - AST-2016-002
Copyright (c) 2015 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
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Asterisk Project Security Advisory - AST-2016-003
Product Asterisk
Summary Remote crash vulnerability when receiving UDPTL FAX
data.
Nature of Advisory Denial of Service
Susceptibility Remote Authenticated Sessions
Severity Minor
Exploits Known Yes
Reported On December 2, 2015
Reported By Walter Dokes, Torrey Searle
Posted On February 3, 2016
Last Updated On February 3, 2016
Advisory Contact Richard Mudgett <rmudgett AT digium DOT com>
CVE Name Pending
Description 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.
Resolution Upgrade to a released version with the fix incorporated or
apply patch.
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-2016-003-1.8.28.diff Certified
Asterisk
1.8.28
http://downloads.asterisk.org/pub/security/AST-2016-003-11.6.diff Certified
Asterisk
11.6
http://downloads.asterisk.org/pub/security/AST-2016-003-13.1.diff Certified
Asterisk
13.1
http://downloads.asterisk.org/pub/security/AST-2016-003-1.8.diff Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2016-003-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2016-003-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2016-003-13.diff Asterisk
13
Links https://issues.asterisk.org/jira/browse/ASTERISK-25603
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-2016-003.pdf and
http://downloads.digium.com/pub/security/AST-2016-003.html
Revision History
Date Editor Revisions Made
December 7, 2015 Richard Mudgett Initial document created
Asterisk Project Security Advisory - AST-2016-003
Copyright (c) 2015 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
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