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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200610-15] Asterisk: Multiple vulnerabilities Vulnerability Assessment Details
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[GLSA-200610-15] Asterisk: Multiple vulnerabilities |
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Asterisk: Multiple vulnerabilities Detailed Explanation for this Vulnerability Assessment The remote host is affected by the vulnerability described in GLSA-200610-15 (Asterisk: Multiple vulnerabilities) Asterisk contains buffer overflows in channels/chan_mgcp.c from the MGCP driver and in channels/chan_skinny.c from the Skinny channel driver for Cisco SCCP phones. It also dangerously handles client-controlled variables to acertain filenames in the Record() function. Finally, the SIP channel driver in channels/chan_sip.c could use more resources than necessary under unspecified circumstances. Impact A remote attacker could execute arbitrary code by sending a crafted audit endpoint (AUEP) response, by sending an overly large Skinny packet even before authentication, or by making use of format strings specifiers through the client-controlled variables. A possible hacker could also cause a Denial of Service by resource consumption through the SIP channel driver. Workaround There is no known workaround for the format strings vulnerability at this time. You can comment the lines in /etc/asterisk/mgcp.conf, /etc/asterisk/skinny.conf and /etc/asterisk/sip.conf to deactivate the three vulnerable channel drivers. Please note that the MGCP channel driver is disabled by default. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4345 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4346 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5444 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5445 Solution: All Asterisk users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.13" Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: (C) 2006 Michel Arboi |
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