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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200609-11] BIND: Denial of Service

Vulnerability Assessment Details

[GLSA-200609-11] BIND: Denial of Service

Vulnerability Assessment Summary
BIND: Denial of Service

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200609-11
(BIND: Denial of Service)

Queries for SIG records will cause an assertion error if more than one
SIG RRset is returned. Additionally, an INSIST failure can be triggered
by sending multiple recursive queries if the response to the query
arrives after all the clients looking for the response have left the
recursion queue.

Impact

A possible hacker having access to a recursive server can crash the server by
querying the SIG records where there are multiple SIG RRsets, or by
sending many recursive queries in a short time. The exposure can be
lowered by restricting the clients that can ask for recursion. An
attacker can also crash an authoritative server serving a DNSSEC zone
in which there are multiple SIG RRsets.

Workaround

There are no known workarounds at this time.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4095
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4096

Solution:
All BIND 9.3 users should update to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/bind-9.3.2-r4"
All BIND 9.2 users should update to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/bind-9.2.6-r4"

Network Security Threat Level: Medium

Networks Security ID:

Vulnerability Assessment Copyright: (C) 2006 Michel Arboi

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