A security issue has been reported in Asterisk, which can be exploited by malicious people to potentially bypass certain security restrictions.
The security issue is caused due to an error while enforcing host access restrictions using the CIDR (Classless Inter-Domain Routing) notation "/0". This can be exploited to potentially bypass "permit=" and "deny=" rules, and access a server from normally restricted hosts.
The security issue is reported in Asterisk Open Source 1.6.x (all 1.6.0, 1.6.1, and 1.6.2 releases).
Solution: Update to version 22.214.171.124, 126.96.36.199, or 188.8.131.52.
Provided and/or discovered by: Reported by the vendor.
Original Advisory: http://downloads.asterisk.org/pub/security/AST-2010-003.html
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