Secunia Security Advisory - A security issue has been reported in Asterisk, which can be exploited by malicious people to potentially bypass certain security restrictions.
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TITLE:
Asterisk CIDR Host Access Rules Security Bypass
SECUNIA ADVISORY ID:
SA38752
VERIFY ADVISORY:
https://secunia.com/advisories/38752/
DESCRIPTION:
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 1.6.0.25, 1.6.1.17, or 1.6.2.5.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
https://downloads.asterisk.org/pub/security/AST-2010-003.html
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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
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