CVE-2009-2726
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 2.0
- 7.8 HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C
- EPSS
- 6.52% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- digium/asterisk · digium/s800i firmware
- Source
- cve@mitre.org
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 Link, Vendor Advisory
- http://www.securityfocus.com/archive/1/505669/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/36015Broken Link, Exploit, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id?1022705Broken Link, Third Party Advisory, VDB Entry
- http://www.vupen.com/english/advisories/2009/2229Broken Link, Vendor 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 Link, Vendor Advisory
- http://www.securityfocus.com/archive/1/505669/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/36015Broken Link, Exploit, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id?1022705Broken Link, Third Party Advisory, VDB Entry
- http://www.vupen.com/english/advisories/2009/2229Broken Link, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.