Asterisk BYE/Also transfer method denial of service
| asterisk-bye-also-dos (39361) |  Low Risk |
Description:
Asterisk is vulnerable to a denial of service, caused by a NULL pointer dereference in the handling of the BYE with Also transfer method. If a dialog has already been established, a remote attacker could attempt to make a transfer using the BYE message and crash the vulnerable application.
Platforms Affected:
- Digium, Asterisk Appliance Developer Kit SVN - 1.4 rev. 95946
- Digium, Asterisk Business Edition C.x.x prior to C.1.0-b8
- Digium, Asterisk Open Source 1.4.x prior to 1.4.17
- Digium, AsteriskNOW pre-release -beta7
- Digium, s800i 1.0.x - 1.0.3.4
Remedy:
Refer to AST-2008-001 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- AST-2008-001, Remote Crash Vulnerability in SIP channel driver at http://downloads.digium.com/pub/security/AST-2008-001.pdf.
- BID-27110: Asterisk BYE Message Remote Denial of Service Vulnerability
- CVE-2008-0095: The SIP channel driver in Asterisk Open Source 1.4.x before 1.4.17, Business Edition before C.1.0-beta8, AsteriskNOW before beta7, Appliance Developer Kit before Asterisk 1.4 revision 95946, and Appliance s800i 1.0.x before 1.0.3.4 allows remote attackers to cause a denial of service (daemon crash) via a BYE message with an Also (Also transfer) header, which triggers a NULL pointer dereference.
- SA28312: Asterisk "BYE/Also" Denial of Service Vulnerability
- SECTRACK ID: 1019152: Asterisk SIP Channel Driver Can Be Crashed By Remote Users With 'BYE with Also' Method
- VUPEN/ADV-2008-0019: Asterisk SIP Channel Driver BYE Message Denial of Service Vulnerability
Reported:
Jan 02, 2008
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