Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2008.0579 -- [Win][UNIX/Linux]
Asterisk - Remote Crash Vulnerability in SIP channel driver
when run in pedantic mode
4 June 2008
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Asterisk Open Source 1.0.x
Asterisk Open Source 1.2.x prior to 1.2.29
Asterisk Business Edition A.x.x
Asterisk Business Edition B.x.x prior to B.2.5.3
Publisher: Digium
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact: Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2008-2119
Original Bulletin:
http://downloads.digium.com/pub/security/AST-2008-008.html
- --------------------------BEGIN INCLUDED TEXT--------------------
Asterisk Project Security Advisory - AST-2008-008
+------------------------------------------------------------------------+
| Product | Asterisk |
|--------------------+---------------------------------------------------|
| Summary | Remote Crash Vulnerability in SIP channel driver |
| | when run in pedantic mode |
|--------------------+---------------------------------------------------|
| Nature of Advisory | Denial of Service |
|--------------------+---------------------------------------------------|
| Susceptibility | Remote Unauthenticated Sessions |
|--------------------+---------------------------------------------------|
| Severity | Critical |
|--------------------+---------------------------------------------------|
| Exploits Known | No |
|--------------------+---------------------------------------------------|
| Reported On | May 8, 2008 |
|--------------------+---------------------------------------------------|
| Reported By | Hooi Ng (bugs.digium.com user hooi) |
|--------------------+---------------------------------------------------|
| Posted On | May 8, 2008 |
|--------------------+---------------------------------------------------|
| Last Updated On | June 3, 2008 |
|--------------------+---------------------------------------------------|
| Advisory Contact | Joshua Colp <jcolp@digium.com> |
|--------------------+---------------------------------------------------|
| CVE Name | CVE-2008-2119 |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Description | During pedantic SIP processing the From header value is |
| | passed to the ast_uri_decode function to be decoded. In |
| | two instances it is possible for the code to cause a |
| | crash as the From header value is not checked to be |
| | non-NULL before being passed to the function. |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Resolution | The From header value is now copied into a buffer before |
| | being passed to the ast_uri_decode function if pedantic |
| | is enabled and in another instance it is checked to be |
| | non-NULL before being passed. |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Affected Versions |
|------------------------------------------------------------------------|
| Product | Release | |
| | Series | |
|-------------------------------+------------+---------------------------|
| Asterisk Open Source | 1.0.x | All versions |
|-------------------------------+------------+---------------------------|
| Asterisk Open Source | 1.2.x | All versions prior to |
| | | 1.2.29 |
|-------------------------------+------------+---------------------------|
| Asterisk Open Source | 1.4.x | Not Affected |
|-------------------------------+------------+---------------------------|
| Asterisk Business Edition | A.x.x | All versions |
|-------------------------------+------------+---------------------------|
| Asterisk Business Edition | B.x.x | All versions prior to |
| | | B.2.5.3 |
|-------------------------------+------------+---------------------------|
| Asterisk Business Edition | C.x.x | Not Affected |
|-------------------------------+------------+---------------------------|
| AsteriskNOW | 1.0.x | Not Affected |
|-------------------------------+------------+---------------------------|
| Asterisk Appliance Developer | 0.x.x | Not Affected |
| Kit | | |
|-------------------------------+------------+---------------------------|
| s800i (Asterisk Appliance) | 1.0.x | Not Affected |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Corrected In |
|------------------------------------------------------------------------|
| Product | Release |
|---------------+--------------------------------------------------------|
| Asterisk Open | 1.2.29, available from |
| Source | http://downloads.digium.com/pub/telephony/asterisk |
|---------------+--------------------------------------------------------|
| Asterisk | B.2.5.3 |
| Business | |
| Edition | |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Links | http://bugs.digium.com/view.php?id=12607 |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| 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-2008-008.pdf and |
| http://downloads.digium.com/pub/security/AST-2008-008.html |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Revision History |
|------------------------------------------------------------------------|
| Date | Editor | Revisions Made |
|------------------+--------------------+--------------------------------|
| 2008-06-03 | Joshua Colp | Initial Release |
+------------------------------------------------------------------------+
Asterisk Project Security Advisory - AST-2008-008
Copyright (c) 2008 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQCVAwUBSEXejih9+71yA2DNAQIxpQP/QiD3BlnoNEgbwwkz9Ekj9vqk5GdSWxGp
8aMxZ+wo0pll8xlfad/4wa1g1qjzb7SUQth0mvMFogtpLDQE4zWEUN0pNVM0FwVV
gaCZo6hok6a15xM8jv4YMEslcOHJsPtRDgUxr9K2Bt3/mOppipP95xtcbXTNoVTo
Lxgsge7kGys=
=CCqU
-----END PGP SIGNATURE-----