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Fencer Vulns
critical 9.1

CVE-2021-3643 json

A flaw was found in sox 14.4.1.

published 2022-05-02 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26942

cvss
9.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

A flaw was found in sox 14.4.1. The lsx_adpcm_init function within libsox leads to a global-buffer-overflow. This flaw allows an attacker to input a malicious file, leading to the disclosure of sensitive information.

Patch / fix

  • sox Debian 13, Debian 12 14.4.2+git20190427-3.2

debian advisories DEBIAN-CVE-2021-3643

  • sox Ubuntu 18.04 LTS 14.4.2-3ubuntu0.18.04.2
  • sox Ubuntu 20.04 LTS 14.4.2+git20190427-2+deb11u1build0.20.04.1
  • sox Ubuntu 22.04 LTS 14.4.2+git20190427-2+deb11u1build0.22.04.1
  • sox Ubuntu Pro 14.04 LTS 14.4.1-3ubuntu1.1+esm2
  • sox Ubuntu Pro 16.04 LTS 14.4.1-5+deb8u4ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2021-3643

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • sox openSUSE Tumbleweed 14.4.2-8.1
  • sox Package Hub 15 SP5, openSUSE Leap 15.5 14.4.2-bp155.3.3.1
  • sox Package Hub 15 SP4, openSUSE Leap 15.4 14.4.2-bp154.2.3.1

opensuse advisories openSUSE-SU-2024:13359-1openSUSE-SU-2023:0329-1openSUSE-SU-2023:0328-1

  • sox Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 14.4.2-r10

alpine advisories ALPINE-CVE-2021-3643

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-3643 updated cvss 5.1

sox: buffer overflow read vulnerability

  • Red Hat Enterprise Linux 5 sox Red Hat Enterprise Linux 6 sox Red Hat Enterprise Linux 7 sox
    affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.47% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P

Affected products

  • n/a sox

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.