Asterisk SIP response packets denial of service
| asterisk-sip-response-dos (33892) |  Medium Risk |
Description:
Asterisk is vulnerable to a denial of service, caused by the improper handling of SIP response packets by the SIP channel driver. A remote attacker could send a specially-crafted SIP response packet to the channel driver to cause a segmentation fault, resulting in a denial of service.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to ASA-2007-011 for patch, upgrade or suggested workaround information. See References.
For Debian/GNU Linux:
Refer to DSA-1358-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- ASA-2007-011: Multiple problems in SIP channel parser handling response codes.
- Asterisk Web site: Asterisk- Downloads.
- Full-Disclosure Mailing List, Tue Apr 24 2007 - 18:22:21 CDT: ASA-2007-011: Multiple problems in SIP channel parser handling response codes.
- BID-24359: Asterisk SIP Channel Driver UDP Packets Remote Denial of Service Vulnerability
- CVE-2007-2297: The SIP channel driver (chan_sip) in Asterisk before 1.2.18 and 1.4.x before 1.4.3 does not properly parse SIP UDP packets that do not contain a valid response code, which allows remote attackers to cause a denial of service (crash).
- DSA-1358: asterisk -- several vulnerabilities
- SECTRACK ID: 1017954: Asterisk SIP Error Response Handling Bugs Let Remote Users Deny Service
- SUSE-SA:2007:034: Asterisk security update
Platforms Affected:
- Debian Debian Linux 3.1
- Debian Debian Linux 4.0
- Digium Asterisk Appliance Developer Kit 0.x.x - 0.4.0
- Digium Asterisk Business Edition A.x.x
- Digium Asterisk Business Edition B.x.x
- Digium Asterisk Open Source 1.0.0
- Digium Asterisk Open Source 1.2.x
- Digium Asterisk Open Source 1.4.x
- Digium AsteriskNOW Beta5 and prior
- Novell OpenSUSE 10.2
- SuSE SuSE SLES 9
Reported:
Apr 25, 2007
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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.