Gentoo Linux Security Advisory 201110-21 - Multiple vulnerabilities in Asterisk might allow unauthenticated remote attackers to execute arbitrary code. Versions less than 1.8.7.1 are affected.
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Asterisk Project Security Advisory - Asterisk may respond differently to SIP requests from an invalid SIP user than it does to a user configured on the system, even when the alwaysauthreject option is set in the configuration. This can leak information about what SIP users are valid on the Asterisk system.
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