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FreeBSD : dns/bind9* -- Heavy DNSSEC Validation Load Can Cause a 'Bad Cache' Assertion Failure (0bc67930-d5c3-11e1-bef6-0024e81297ae)

high Nessus Plugin ID 60114

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

ISC reports :

High numbers of queries with DNSSEC validation enabled can cause an assertion failure in named, caused by using a 'bad cache' data structure before it has been initialized.

BIND 9 stores a cache of query names that are known to be failing due to misconfigured name servers or a broken chain of trust. Under high query loads when DNSSEC validation is active, it is possible for a condition to arise in which data from this cache of failing queries could be used before it was fully initialized, triggering an assertion failure.

This bug cannot be encountered unless your server is doing DNSSEC validation.

Solution

Update the affected packages.

See Also

https://kb.isc.org/docs/aa-00729

http://www.nessus.org/u?1daad570

Plugin Details

Severity: High

ID: 60114

File Name: freebsd_pkg_0bc67930d5c311e1bef60024e81297ae.nasl

Version: 1.10

Type: local

Published: 7/25/2012

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:bind96, p-cpe:/a:freebsd:freebsd:bind97, p-cpe:/a:freebsd:freebsd:bind98, p-cpe:/a:freebsd:freebsd:bind99, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 7/24/2012

Vulnerability Publication Date: 7/24/2012

Reference Information

CVE: CVE-2012-3817