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Family: Gentoo Local Security Checks --> Category: infos
[GLSA-200504-03] Dnsmasq: Poisoning and Denial of Service vulnerabilities Vulnerability Scan
Vulnerability Scan Summary
Dnsmasq: Poisoning and Denial of Service vulnerabilities
Detailed Explanation for this Vulnerability Test
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 allow 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"
Threat Level: Low
Click HERE for more information and discussions on this network vulnerability scan.
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