CVE-2009-2726
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.
How to fix CVE-2009-2726
To remediate CVE-2009-2726, upgrade the affected package to a fixed version below.
- —upgrade to 1:1.6.2.0~dfsg~rc1-1 or later
Is CVE-2009-2726 being exploited?
Moderate — EPSS is 30.7%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 1:1.6.2.0~dfsg~rc1-1