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ISC BIND DoS Vulnerability (CVE-2016-2088)

Information

Severity

Severity

Medium

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

4.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

1 year ago

Modified

Modified

1 year ago

Summary

ISC BIND is prone to a denial of service (DoS) vulnerability.

Insight

Insight

BIND 9.10 has preliminary support for DNS cookies (or source identity tokens), a proposed mechanism designed to allow lightweight transaction security between a querying party and a nameserver. An error in the BIND code implementing support for this optional feature permits a deliberately misconstructed packet containing multiple cookie options to cause named to terminate with an INSIST assertion failure in resolver.c if DNS cookie support is enabled in the server. Only servers with DNS cookie support enabled at build time can be affected by this defect. In servers which do not have DNS cookie support selected, any cookies encountered will be ignored as unknown option types.

Affected Software

Affected Software

ISC BIND version 9.10.x through 9.10.3-P3.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 9.10.3-P4 or later.

Common Vulnerabilities and Exposures (CVE)