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SUSE SLES15 Security Update : shadow (SUSE-SU-2023:2070-1)

low Nessus Plugin ID 174943

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:2070-1 advisory.

 - In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that cat /etc/passwd shows a rogue user account. (CVE-2023-29383)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected login_defs and / or shadow packages.

See Also

https://bugzilla.suse.com/1210507

https://www.suse.com/security/cve/CVE-2023-29383

http://www.nessus.org/u?5120e269

Plugin Details

Severity: Low

ID: 174943

File Name: suse_SU-2023-2070-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/29/2023

Updated: 7/14/2023

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Low

Base Score: 1.7

Temporal Score: 1.3

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

CVSS Score Source: CVE-2023-29383

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 3

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:login_defs, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:shadow

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/28/2023

Vulnerability Publication Date: 4/14/2023

Reference Information

CVE: CVE-2023-29383

SuSE: SUSE-SU-2023:2070-1