Debian DSA-4752-1 : bind9 - security update

medium Nessus Plugin ID 139930

Synopsis

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

Description

Several vulnerabilities were discovered in BIND, a DNS server implementation.

- CVE-2020-8619 It was discovered that an asterisk character in an empty non terminal can cause an assertion failure, resulting in denial of service.

- CVE-2020-8622 Dave Feldman, Jeff Warren, and Joel Cunningham reported that a truncated TSIG response can lead to an assertion failure, resulting in denial of service.

- CVE-2020-8623 Lyu Chiy reported that a flaw in the native PKCS#11 code can lead to a remotely triggerable assertion failure, resulting in denial of service.

- CVE-2020-8624 Joop Boonen reported that update-policy rules of type 'subdomain' are enforced incorrectly, allowing updates to all parts of the zone along with the intended subdomain.

Solution

Upgrade the bind9 packages.

For the stable distribution (buster), these problems have been fixed in version 1:9.11.5.P4+dfsg-5.1+deb10u2.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966497

https://security-tracker.debian.org/tracker/CVE-2020-8619

https://security-tracker.debian.org/tracker/CVE-2020-8622

https://security-tracker.debian.org/tracker/CVE-2020-8623

https://security-tracker.debian.org/tracker/CVE-2020-8624

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

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

https://www.debian.org/security/2020/dsa-4752

Plugin Details

Severity: Medium

ID: 139930

File Name: debian_DSA-4752.nasl

Version: 1.4

Type: local

Agent: unix

Published: 8/28/2020

Updated: 6/3/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2020-8624

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:bind9, cpe:/o:debian:debian_linux:10.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/27/2020

Vulnerability Publication Date: 6/17/2020

Reference Information

CVE: CVE-2020-8619, CVE-2020-8622, CVE-2020-8623, CVE-2020-8624

DSA: 4752

IAVA: 2020-A-0385-S