Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : bind9 vulnerabilities (USN-4365-1)

Medium Nessus Plugin ID 136730

Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind incorrectly limited certain fetches. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service, or possibly use Bind to perform a reflection attack.
(CVE-2020-8616)

Tobias Klein discovered that Bind incorrectly handled checking TSIG validity. A remote attacker could use this issue to cause Bind to crash, resulting in a denial of service, or possibly perform other attacks. (CVE-2020-8617).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected bind9 package.

See Also

https://usn.ubuntu.com/4365-1/

Plugin Details

Severity: Medium

ID: 136730

File Name: ubuntu_USN-4365-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 2020/05/20

Updated: 2020/05/29

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2020-8617

CVSS v2.0

Base Score: 5

Temporal Score: 3.9

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:bind9, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.10, cpe:/o:canonical:ubuntu_linux:20.04

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2020/05/19

Vulnerability Publication Date: 2020/05/19

Reference Information

CVE: CVE-2020-8616, CVE-2020-8617

USN: 4365-1

IAVA: 2020-A-0217