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.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to AST-2008-001 for patch, upgrade, or suggested workaround information. See References.
References:
- AST-2008-001: Remote Crash Vulnerability in SIP channel driver.
- 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
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
Reported:
Jan 02, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.