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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 220.127.116.11, 1.6.0.x before 18.104.22.168, and 1.6.1.x before 22.214.171.124; 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 126.96.36.199 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.
Description Last Modified:
Access Vector (AV):
Access Complexity (AC):
Allows disruption of service
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http://www.securityfocus.com/archive/1/505669/100/0/threaded [No Types Assigned]
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