Vulnerability Assessment & Network Security Forums
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.
Vulnerability Assessment Details
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
A remote attacker could crash the server through unspecified vectors
or, if DNSSEC validation is enabled, by sending certain crafted ANY
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.
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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