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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-200504-03] Dnsmasq: Poisoning and Denial of Service vulnerabilities Vulnerability Assessment Details
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[GLSA-200504-03] Dnsmasq: Poisoning and Denial of Service vulnerabilities |
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Dnsmasq: Poisoning and Denial of Service vulnerabilities Detailed Explanation for this Vulnerability Assessment The remote host is affected by the vulnerability described in GLSA-200504-03 (Dnsmasq: Poisoning and Denial of Service vulnerabilities) Dnsmasq does not properly detect that DNS replies received do not correspond to any DNS query that was sent. Rob Holland of the Gentoo Linux Security Audit team also discovered two off-by-one buffer overflows that could crash DHCP lease files parsing. Impact A remote attacker could send malicious answers to insert arbitrary DNS data into the Dnsmasq cache. These attacks would in turn help an attacker to perform man-in-the-middle and site impersonation attacks. The buffer overflows might permit a possible hacker on the local network to crash Dnsmasq upon restart. Workaround There is no known workaround at this time. References: http://www.thekelleys.org.uk/dnsmasq/CHANGELOG Solution: All Dnsmasq users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.22" Network Security Threat Level: Low Networks Security ID: Vulnerability Assessment Copyright: (C) 2005 Michel Arboi |
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