what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

Asterisk Project Security Advisory - AST-2016-007

Asterisk Project Security Advisory - AST-2016-007
Posted Sep 9, 2016
Authored by Joshua Colp | Site asterisk.org

Asterisk Project Security Advisory - The overlap dialing feature in chan_sip allows chan_sip to report to a device that the number that has been dialed is incomplete and more digits are required. If this functionality is used with a device that has performed username/password authentication RTP resources are leaked. This occurs because the code fails to release the old RTP resources before allocating new ones in this scenario. If all resources are used then RTP port exhaustion will occur and no RTP sessions are able to be set up.

tags | advisory
SHA-256 | 97fcad4b2cc395997d99694e3df652f77ddb75c1bf9f3258efb47206a678a1c1

Asterisk Project Security Advisory - AST-2016-007

Change Mirror Download
               Asterisk Project Security Advisory - AST-2016-007

Product Asterisk
Summary RTP Resource Exhaustion
Nature of Advisory Denial of Service
Susceptibility Remote Authenticated Sessions
Severity Moderate
Exploits Known No
Reported On August 5, 2016
Reported By Etienne Lessard
Posted On
Last Updated On September 8, 2016
Advisory Contact Joshua Colp <jcolp AT digium DOT com>
CVE Name

Description The overlap dialing feature in chan_sip allows chan_sip to
report to a device that the number that has been dialed is
incomplete and more digits are required. If this
functionality is used with a device that has performed
username/password authentication RTP resources are leaked.
This occurs because the code fails to release the old RTP
resources before allocating new ones in this scenario. If
all resources are used then RTP port exhaustion will occur
and no RTP sessions are able to be set up.

Resolution If overlap dialing support is not needed the aallowoverlapa
option can be set to no. This will stop any usage of the
scenario which causes the resource exhaustion.

If overlap dialing support is needed a change has been made
so that existing RTP resources are destroyed in this
scenario before allocating new resources.

Affected Versions
Product Release
Series
Asterisk Open Source 11.x All Versions
Asterisk Open Source 13.x All Versions
Certified Asterisk 11.6 All Versions
Certified Asterisk 13.8 All Versions

Corrected In
Product Release
Asterisk Open Source 11.23.1, 13.11.1
Certified Asterisk 11.6-cert15, 13.8-cert3

Patches
SVN URL Revision

Links https://issues.asterisk.org/jira/browse/ASTERISK-26272

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-2016-007.pdf and
http://downloads.digium.com/pub/security/AST-2016-007.html

Revision History
Date Editor Revisions Made
August 23, 2016 Joshua Colp Initial creation

Asterisk Project Security Advisory - AST-2016-007
Copyright A(c) 2016 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.

Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close