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 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.

• digium asterisk (< b.2.5.9) • digium asterisk (>= c.2.0 <= c.2.4.1) • digium asterisk (>= c.3.0 < c.3.1) • digium s800i firmware (>= 1.2.0 < 1.3.0.3) • digium asterisk (>= 1.2.0 < 1.2.34) • digium asterisk (>= 1.4.0 < 1.4.26.1) • digium asterisk (>= 1.6.0 < 1.6.0.12) • digium asterisk (>= 1.6.1 < 1.6.1.4)