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ISC BIND DoS Vulnerability (CVE-2011-1907)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
ISC BIND is prone to a denial of service (DoS) vulnerability.
Insight
Insight
BIND 9.8.0 introduced Response Policy Zones (RPZ), a mechanism for modifying DNS responses returned by a recursive server according to a set of rules which are either defined locally or imported from a reputation provider. In typical configurations, RPZ is used to force NXDOMAIN responses for untrusted names. It can also be used for RRset replacement, i.e., returning a positive answer defined by the response policy.
Affected Software
Affected Software
ISC BIND version 9.8.0 only. Note: Only BIND installations which are using the RPZ feature configured for RRset replacement are affected.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 9.8.0-P1 or later. As a workaround use RPZ only for forcing NXDOMAIN responses and not for RRset replacement.