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ISC BIND Resolver Cache Vulnerability - Jan16
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:P/A:N
Solution Type
Solution Type
Workaround
Created
Created
8 years ago
Modified
Modified
5 years ago
Summary
The host is installed with ISC BIND and is prone to resolver cache vulnerability.
Insight
Insight
The flaw exists due to the resolver overwrites cached server names and TTL values in NS records during the processing of a response to an A record query.
Affected Software
Affected Software
ISC BIND versions 9 through 9.8.1-P1.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
As a workaround it is recommended to clear the cache, which will remove cached bad records but is not an effective or practical preventative approach.