exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Asterisk Project Security Advisory - AST-2015-003

Asterisk Project Security Advisory - AST-2015-003
Posted Apr 9, 2015
Authored by Jonathan Rose | Site asterisk.org

Asterisk Project Security Advisory - When Asterisk registers to a SIP TLS device and and verifies the server, Asterisk will accept signed certificates that match a common name other than the one Asterisk is expecting if the signed certificate has a common name containing a null byte after the portion of the common name that Asterisk expected.

tags | advisory
advisories | CVE-2015-3008
SHA-256 | b08ef4b3d0f8ba0061a7cd3e5a8e37967a3286590dcc31a21c17c24ecb06371e

Asterisk Project Security Advisory - AST-2015-003

Change Mirror Download
               Asterisk Project Security Advisory - AST-2015-003

Product Asterisk
Summary TLS Certificate Common name NULL byte exploit
Nature of Advisory Man in the Middle Attack
Susceptibility Remote Authenticated Sessions
Severity Major
Exploits Known None
Reported On 12 January, 2015
Reported By Maciej Szmigiero
Posted On March 04, 2015
Last Updated On April 8, 2015
Advisory Contact Jonathan Rose <jrose AT digium DOT com>
CVE Name CVE-2015-3008

Description When Asterisk registers to a SIP TLS device and and verifies the
server, Asterisk will accept signed certificates that match a
common name other than the one Asterisk is expecting if the
signed certificate has a common name containing a null byte
after the portion of the common name that Asterisk expected. For
example, if Asterisk is trying to register to www.domain.com,
Asterisk will accept certificates of the form
www.domain.com\x00www.someotherdomain.com - for more information
on this exploit, see
https://fotisl.com/blog/2009/10/the-null-certificate-prefix-bug/

Resolution Asterisk has been patched to verify that the common name
length of the certificate matches the common name that
Asterisk actually reads. Asterisk will not accept
certificates with common names that contain null bytes.

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 1.8.32.3, 11.17.1, 12.8.2 13.3.2
Certified Asterisk 1.8.28-cert5, 11.6-cert11, 13.1-cert2

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2015-003-1.8.28.diff Certified
Asterisk
1.8.28
http://downloads.asterisk.org/pub/security/AST-2015-003-11.6.diff Certified
Asterisk
11.6
http://downloads.asterisk.org/pub/security/AST-2015-003-13.1.diff Certified
Asterisk
13.1
http://downloads.asterisk.org/pub/security/AST-2015-003-1.8.diff Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2015-003-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2015-003-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2015-003-13.diff Asterisk
13

Links https://issues.asterisk.org/jira/browse/ASTERISK-24847

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-2015-003.pdf and
http://downloads.digium.com/pub/security/AST-2015-003.html

Revision History
Date Editor Revisions Made
19 March, 2015 Jonathan Rose Initial creation of document
08 April, 2015 Matt Jordan Added CVE.

Asterisk Project Security Advisory - AST-2015-003
Copyright (c) 2015 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
    0 Files
  • 20
    Mar 20th
    0 Files
  • 21
    Mar 21st
    0 Files
  • 22
    Mar 22nd
    0 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    0 Files
  • 26
    Mar 26th
    0 Files
  • 27
    Mar 27th
    0 Files
  • 28
    Mar 28th
    0 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