CVE-2009-2726

N/A Unknown
Published: August 12, 2009 Modified: April 23, 2026
View on NVD

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.

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References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://downloads.digium.com/pub/security/AST-2009-005.html
Source: cve@mitre.org
Product
http://labs.mudynamics.com/advisories/MU-200908-01.txt
Source: cve@mitre.org
Broken Link
http://secunia.com/advisories/36227
Source: cve@mitre.org
Broken Link Vendor Advisory
http://www.securityfocus.com/archive/1/505669/100/0/threaded
Source: cve@mitre.org
Broken Link Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/36015
Source: cve@mitre.org
Broken Link Exploit Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1022705
Source: cve@mitre.org
Broken Link Third Party Advisory VDB Entry
http://www.vupen.com/english/advisories/2009/2229
Source: cve@mitre.org
Broken Link Vendor Advisory
http://downloads.digium.com/pub/security/AST-2009-005.html
Source: af854a3a-2127-422b-91ae-364da2661108
Product
http://labs.mudynamics.com/advisories/MU-200908-01.txt
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/36227
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Vendor Advisory
http://www.securityfocus.com/archive/1/505669/100/0/threaded
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/36015
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Exploit Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1022705
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Third Party Advisory VDB Entry
http://www.vupen.com/english/advisories/2009/2229
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Vendor Advisory

14 reference(s) from NVD

Quick Stats

CVSS v3 Score
N/A / 10.0
EPSS (Exploit Probability)
30.7%
97th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-770

Affected Vendors

digium

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