Detections
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Alpine: multiple shadow packages: security update to 4.13-r3 (deprecated)

low Tenable Cloud Security Plugin ID 400085

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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 \n 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)

See Also

https://git.alpinelinux.org/aports/commit/?id=170e54facefaac07576bc8e2b34d67648d50503e

https://git.alpinelinux.org/aports/commit/?id=ced7d1352a777ca74690428c07a5ba25e2e76188

Plugin Details

Severity: Low

ID: 400085

Version: Revision 1.31

Type: Local

Published: 6/14/2023

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/14/2023

Vulnerability Publication Date: 4/14/2023

Reference Information

CVE: CVE-2023-29383