Vulnerability Description
The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | < b.2.5.9 |
| Digium | S800I Firmware | >= 1.2.0, < 1.3.0.3 |
| Digium | S800I | - |
Related Weaknesses (CWE)
References
- http://downloads.digium.com/pub/security/AST-2009-005.htmlProduct
- http://labs.mudynamics.com/advisories/MU-200908-01.txtBroken Link
- http://secunia.com/advisories/36227Broken LinkVendor Advisory
- http://www.securityfocus.com/archive/1/505669/100/0/threadedBroken LinkThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/36015Broken LinkExploitThird Party Advisory
- http://www.securitytracker.com/id?1022705Broken LinkThird Party AdvisoryVDB Entry
- http://www.vupen.com/english/advisories/2009/2229Broken LinkVendor Advisory
- http://downloads.digium.com/pub/security/AST-2009-005.htmlProduct
- http://labs.mudynamics.com/advisories/MU-200908-01.txtBroken Link
- http://secunia.com/advisories/36227Broken LinkVendor Advisory
- http://www.securityfocus.com/archive/1/505669/100/0/threadedBroken LinkThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/36015Broken LinkExploitThird Party Advisory
- http://www.securitytracker.com/id?1022705Broken LinkThird Party AdvisoryVDB Entry
- http://www.vupen.com/english/advisories/2009/2229Broken LinkVendor Advisory
FAQ
What is CVE-2009-2726?
CVE-2009-2726 is a vulnerability with a CVSS score of 7.8 (HIGH). The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C...
How severe is CVE-2009-2726?
CVE-2009-2726 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-2726?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk, Digium S800I Firmware, Digium S800I.