CVE-2021-25321

30.06.2021, 09:15

A UNIX Symbolic Link (Symlink) Following vulnerability in arpwatch of SUSE Linux Enterprise Server 11-SP4-LTSS, SUSE Manager Server 4.0, SUSE OpenStack Cloud Crowbar 9; openSUSE Factory, Leap 15.2 allows local attackers with control of the runtime user to run arpwatch as to escalate to root upon the next restart of arpwatch. This issue affects: SUSE Linux Enterprise Server 11-SP4-LTSS arpwatch versions prior to 2.1a15. SUSE Manager Server 4.0 arpwatch versions prior to 2.1a15. SUSE OpenStack Cloud Crowbar 9 arpwatch versions prior to 2.1a15. openSUSE Factory arpwatch version 2.1a15-169.5 and prior versions. openSUSE Leap 15.2 arpwatch version 2.1a15-lp152.5.5 and prior versions.

Symlink

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
suse	CNA	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 30%

Vendor	Product	Version
suse	arpwatch	𝑥 < 2.1a15
suse	arpwatch	𝑥 ≤ 2.1a15-169.5
suse	arpwatch	𝑥 ≤ 2.1a15-lp152.5.5

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

arpwatch

bookworm	2.1a15-8 fixed
bullseye	2.1a15-8 fixed
sid	2.1a15-9 fixed
trixie	2.1a15-9 fixed

Ubuntu Releases

Ubuntu Product

Codename

arpwatch

noble	not-affected
mantic	not-affected
lunar	not-affected
kinetic	not-affected
jammy	not-affected
impish	not-affected
hirsute	not-affected
groovy	not-affected
focal	not-affected
bionic	not-affected
xenial	needed
trusty	dne

Known Exploits!

Common Weakness Enumeration

CWE-61 - UNIX Symbolic Link (Symlink) Following
The software, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the software to operate on unauthorized files.

References

https://bugzilla.suse.com/show_bug.cgi?id=1186240