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Asterisk Project Security Advisory - AST-2014-007

Asterisk Project Security Advisory - AST-2014-007
Posted Jun 13, 2014
Authored by Richard Mudgett | Site asterisk.org

Asterisk Project Security Advisory - 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.

tags | advisory, web, tcp
advisories | CVE-2014-4047
SHA-256 | e6779aabe2219ce71ab967736150fa4798031e2d5a8f66d132a104297bd2b824

Asterisk Project Security Advisory - AST-2014-007

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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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