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Home arrow SecurityAlert Database

Arrow  Topic :

Crash from transfer using BYE with Also header


Arrow  SecurityAlert : 3520
Arrow  CVE : CVE-2008-0095
Arrow  SecurityRisk : Low  Security Risk Low  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : No
Arrow  Credit : Joshua Colp
Arrow  Published : 08.01.2008

Arrow  Affected Software : − Asterisk, Open Source, 1.4.16, and previous
− Asterisk, Asterisk Business Edition, C.1.0beta7, and previous
− Asterisk, Asterisk Appliance Developer Kit, 1.4_revision_95945,
and previous
− Asterisk, AsteriskNOW, Beta 6, and previous
− Asterisk, S800i, 1.0.3.3, and previous



Arrow  Advisory Content :  

Asterisk Project Security Advisory - AST-2008-001

+-----------------------------------------------------------------------
-+
| Product | Asterisk
|

|---------------------+-------------------------------------------------
-|
| Summary | Remote Crash Vulnerability in SIP channel
driver |

|---------------------+-------------------------------------------------
-|
| Nature of Advisory | Denial of Service
|

|---------------------+-------------------------------------------------
-|
| Susceptibility | Remote Unauthenticated Sessions
|

|---------------------+-------------------------------------------------
-|
| Severity | Critical
|

|---------------------+-------------------------------------------------
-|
| Exploits Known | No
|

|---------------------+-------------------------------------------------
-|
| Reported On | December 26, 2007
|

|---------------------+-------------------------------------------------
-|
| Reported By | Grey VoIP (bugs.digium.com user greyvoip)
|

|---------------------+-------------------------------------------------
-|
| Posted On | January 2, 2008
|

|---------------------+-------------------------------------------------
-|
| Last Updated On | January 2, 2008
|

|---------------------+-------------------------------------------------
-|
| Advisory Contact | Joshua Colp <jcolp (at) digium (dot) com [email
concealed]> |

|---------------------+-------------------------------------------------
-|
| CVE Name |
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| Description | The handling of the BYE with Also transfer method was
|
| | broken during the development of Asterisk 1.4. If a
|
| | transfer attempt is made using this method the system
|
| | will immediately crash upon handling the BYE message
due |
| | to trying to copy data into a NULL pointer. It is
|
| | important to note that a dialog must have already been
|
| | established and up in order for this to happen.
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| Resolution | A fix has been added so that the BYE with Also transfer
|
| | method now properly allocates and uses the transfer data
|
| | structure. It will no longer try to copy data into a
NULL |
| | pointer and will operate properly.
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| Affected Versions
|

|-----------------------------------------------------------------------
-|
| Product | Release |
|
| | Series |
|

|----------------------------+-------------+----------------------------
-|
| Asterisk Open Source | 1.0.x | Unaffected
|

|----------------------------+-------------+----------------------------
-|
| Asterisk Open Source | 1.2.x | Unaffected
|

|----------------------------+-------------+----------------------------
-|
| Asterisk Open Source | 1.4.x | All versions prior to
|
| | | 1.4.17
|

|----------------------------+-------------+----------------------------
-|
| Asterisk Business Edition | A.x.x | Unaffected
|

|----------------------------+-------------+----------------------------
-|
| Asterisk Business Edition | B.x.x | Unaffected
|

|----------------------------+-------------+----------------------------
-|
| Asterisk Business Edition | C.x.x | All versions prior to
|
| | | C.1.0-beta8
|

|----------------------------+-------------+----------------------------
-|
| AsteriskNOW | pre-release | All versions prior to
beta7 |

|----------------------------+-------------+----------------------------
-|
| Asterisk Appliance | SVN | All versions prior to
|
| Developer Kit | | Asterisk 1.4 revision
95946 |

|----------------------------+-------------+----------------------------
-|
| s800i (Asterisk Appliance) | 1.0.x | All versions prior to
|
| | | 1.0.3.4
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| Corrected In
|

|-----------------------------------------------------------------------
-|
| Product | Release
|

|---------------+-------------------------------------------------------
-|
| Asterisk Open | 1.4.17, available from
|
| Source | http://downloads.digium.com/pub/telephony/asterisk
|

|---------------+-------------------------------------------------------
-|
| Asterisk | C.1.0
|
| Business |
|
| Edition |
|

|---------------+-------------------------------------------------------
-|
| AsteriskNOW | Beta7, available from http://www.asterisknow.org/.
|
| |
|
| | Beta5 and Beta6 users can update using the system
|
| | update feature in the appliance control panel.
|

|---------------+-------------------------------------------------------
-|
| Asterisk | Asterisk 1.4 revision 95946. Available by performing
|
| Appliance | an svn update of the AADK tree.
|
| Developer Kit |
|

|---------------+-------------------------------------------------------
-|
| s800i | 1.0.3.4
|
| (Asterisk |
|
| Appliance) |
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| Links | http://bugs.digium.com/view.php?id=11637
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| 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-2008-001.pdf and
|
| http://downloads.digium.com/pub/security/AST-2008-001.html
|

+-----------------------------------------------------------------------
-+

+-----------------------------------------------------------------------
-+
| Revision History
|

|-----------------------------------------------------------------------
-|
| Date | Editor | Revisions Made
|

|------------------+--------------------+-------------------------------
-|
| 2008-01-02 | Joshua Colp | Initial Release
|

+-----------------------------------------------------------------------
-+

Asterisk Project Security Advisory - AST-2008-001
Copyright (c) 2007 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in
its
original, unaltered form.






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