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Debian DSA-4994-1 : bind9 - security update

medium Nessus Plugin ID 154707

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 10 / 11 host has packages installed that are affected by a vulnerability as referenced in the dsa-4994 advisory.

 - In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing. (CVE-2021-25219)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the bind9 packages.

For the stable distribution (bullseye), this problem has been fixed in version 1

See Also

https://security-tracker.debian.org/tracker/source-package/bind9

https://www.debian.org/security/2021/dsa-4994

https://security-tracker.debian.org/tracker/CVE-2021-25219

https://packages.debian.org/source/buster/bind9

https://packages.debian.org/source/bullseye/bind9

Plugin Details

Severity: Medium

ID: 154707

File Name: debian_DSA-4994.nasl

Version: 1.6

Type: local

Agent: unix

Published: 10/28/2021

Updated: 2/17/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-25219

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:bind9, p-cpe:/a:debian:debian_linux:bind9-dev, p-cpe:/a:debian:debian_linux:bind9-dnsutils, p-cpe:/a:debian:debian_linux:bind9-doc, p-cpe:/a:debian:debian_linux:bind9-host, p-cpe:/a:debian:debian_linux:bind9-libs, p-cpe:/a:debian:debian_linux:bind9-utils, p-cpe:/a:debian:debian_linux:bind9utils, p-cpe:/a:debian:debian_linux:dnsutils, p-cpe:/a:debian:debian_linux:libbind-dev, p-cpe:/a:debian:debian_linux:libbind-export-dev, p-cpe:/a:debian:debian_linux:libbind9-161, p-cpe:/a:debian:debian_linux:libdns-export1104, p-cpe:/a:debian:debian_linux:libdns1104, p-cpe:/a:debian:debian_linux:libirs-export161, p-cpe:/a:debian:debian_linux:libirs161, p-cpe:/a:debian:debian_linux:libisc-export1100, p-cpe:/a:debian:debian_linux:libisc1100, p-cpe:/a:debian:debian_linux:libisccc-export161, p-cpe:/a:debian:debian_linux:libisccc161, p-cpe:/a:debian:debian_linux:libisccfg-export163, p-cpe:/a:debian:debian_linux:libisccfg163, p-cpe:/a:debian:debian_linux:liblwres161, cpe:/o:debian:debian_linux:10.0, cpe:/o:debian:debian_linux:11.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/28/2021

Vulnerability Publication Date: 10/27/2021

Reference Information

CVE: CVE-2021-25219

IAVA: 2021-A-0525-S