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CVE-2009-2726

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 201006-20
Posted Jun 4, 2010
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201006-20 - Multiple vulnerabilities in Asterisk might allow remote attackers to cause a Denial of Service condition, or conduct other attacks. Versions less than 1.2.37 are affected.

tags | advisory, remote, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2008-7220, CVE-2009-2346, CVE-2009-2726, CVE-2009-3727, CVE-2009-4055
SHA-256 | c4933913b3f7de08c2c9cdd1eaa67457d52f479496c2830a647cc345b7604953
Asterisk Project Security Advisory - Driver Crash
Posted Aug 11, 2009
Authored by Tilghman Lesher | Site asterisk.org

Asterisk Project Security Advisory - On certain implementations of libc, the scanf family of functions uses an unbounded amount of stack memory to repeatedly allocate string buffers prior to conversion to the target type. Coupled with Asterisk's allocation of thread stack sizes that are smaller than the default, an attacker may exhaust stack memory in the SIP stack network thread by presenting excessively long numeric strings in various fields.

tags | advisory
advisories | CVE-2009-2726
SHA-256 | b1dc46b65ba0899d179d5df802c216ac411cd9b7c37c701cd854541313c4d1e2
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