Alpine: multiple ytnef packages: security update to 1.9.3-r1

high Tenable Self-Hosted Container Security Plugin ID 427546

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- In ytnef 1.9.3, the TNEFSubjectHandler function in lib/ytnef.c allows remote attackers to cause a denial-
of-service (and potentially code execution) due to a double free which can be triggered via a crafted
file. (CVE-2021-3403)

- In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service
(and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.
(CVE-2021-3404)

Plugin Details

Severity: High

ID: 427546

Version: Revision 1.3

Type: Local

Family: Alpine Linux Local Security Checks

Published: 5/16/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2021-3404

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 3/4/2021

Reference Information

CVE: CVE-2021-3403, CVE-2021-3404

Detections

Analytics