| Package | Affected versions | Patched versions |
|---|---|---|
| asterisk | ≥ 1.2.0, < 1.2.34≥ 1.4.0, < 1.4.26.1≥ 1.6.0, < 1.6.0.12≥ 1.6.1, < 1.6.1.4≥ c.2.0, ≤ c.2.4.1≥ c.3.0, < c.3.1< b.2.5.9 | 1.2.341.4.26.11.6.0.121.6.1.4c.3.1b.2.5.9 |
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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