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-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
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.
There are no known workarounds at this time.
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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