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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200702-06] BIND: Denial of Service

Vulnerability Assessment Details

[GLSA-200702-06] 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-200702-06
(BIND: Denial of Service)

An unspecified improper usage of an already freed context has been
reported. Additionally, an assertion error could be triggered in the
DNSSEC validation of some responses to type ANY queries with multiple
RRsets.

Impact

A remote attacker could crash the server through unspecified vectors
or, if DNSSEC validation is enabled, by sending certain crafted ANY
queries.

Workaround

There is no known workaround at this time for the first issue. The
DNSSEC validation Denial of Service can be prevented by disabling
DNSSEC validation until the upgrade to a fixed version. Note that
DNSSEC validation is disabled on a default configuration.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0493
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-CVE-2007-0494

Solution:
All ISC BIND 9.3 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/bind-9.3.4"
All ISC BIND 9.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/bind-9.2.8"

Network Security Threat Level: Medium

Networks Security ID:

Vulnerability Assessment Copyright: (C) 2007 Michel Arboi

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