Debian DSA-4752-1 : bind9 - security update

Medium Nessus Plugin ID 139930

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VPR Score: 3.6

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: 1.3

Type: local

Agent: unix

Published: 2020/08/28

Updated: 2020/09/04

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2020-8624

CVSS v2.0

Base Score: 4

Temporal Score: 3

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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: CVSS:3.0/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: 2020/08/27

Vulnerability Publication Date: 2020/06/17

Reference Information

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

DSA: 4752

IAVA: 2020-A-0385