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AUSCERT External Security Bulletin Redistribution
ESB-2014.0989
Multiple vulnerabilities have been identified in Asterisk
16 June 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Asterisk
Publisher: Digium
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-4048 CVE-2014-4047 CVE-2014-4046
CVE-2014-4045
Original Bulletin:
http://downloads.digium.com/pub/security/AST-2014-005.html
http://downloads.digium.com/pub/security/AST-2014-006.html
http://downloads.digium.com/pub/security/AST-2014-007.html
http://downloads.digium.com/pub/security/AST-2014-008.html
Comment: This bulletin contains four (4) Digium security advisories.
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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 <jbigelow AT digium DOT com>
Posted On June 12, 2014
Last Updated On June 12, 2014
Advisory Contact Kevin Harwell <kharwell AT digium DOT com>
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This document may be superseded by later versions; if so, the latest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
Revision History
Date Editor Revisions Made
April 14, 2014 Kevin Harwell Document Creation
June 12, 2014 Matt Jordan Added CVE
Asterisk Project Security Advisory - AST-2014-005
Copyright (c) 2014 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-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
Revision History
Date Editor Revisions Made
April 23, 2014 Jonathan Rose Document Creation
June 12, 2014 Matt Jordan Added CVE
Asterisk Project Security Advisory - AST-2014-006
Copyright (c) 2014 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-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 <rmudgett AT digium DOT com>
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
Revision History
Date Editor Revisions Made
May 9, 2014 Richard Mudgett Document Creation
June 12, 2014 Matt Jordan Added CVE
Asterisk Project Security Advisory - AST-2014-007
Copyright (c) 2014 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-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 <mmichelson AT digium DOT com>
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
Revision History
Date Editor Revisions Made
June 6, 2014 Mark Michelson Document Creation
June 12, 2014 Matt Jordan Added CVE
Asterisk Project Security Advisory - AST-2014-008
Copyright (c) 2014 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
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