GLSA-202101-38 : NSD: Symbolic link traversal

medium Nessus Plugin ID 145564
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Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-202101-38 (NSD: Symbolic link traversal)

A local vulnerability was discovered that would allow for a local symlink attack due to how NSD handles PID files.
Impact :

A local attacker could cause a Denial of Service condition.
Workaround :

There is no known workaround at this time.

Solution

All NSD users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-dns/nsd-4.3.4'

See Also

https://www.nlnetlabs.nl/downloads/nsd/CVE-2020-28935.txt

https://security.gentoo.org/glsa/202101-38

Plugin Details

Severity: Medium

ID: 145564

File Name: gentoo_GLSA-202101-38.nasl

Version: 1.2

Type: local

Published: 1/29/2021

Updated: 2/2/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

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

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:nsd, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/29/2021

Vulnerability Publication Date: 12/7/2020

Reference Information

CVE: CVE-2020-28935

GLSA: 202101-38