CVE-2021-33844
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of...
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
5.5
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
CVE-2021-33844- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-369
- Updated
- 2026-11-02
CVE List No score
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
CVE-2021-33844- Weakness
- CWE-369
- Updated
- 2026-11-02
EUVDEUVD-2021-20518 No score
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
EUVD-2021-20518- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3q4f-g8fc-j65f
5.5
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of...
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
GHSA-3q4f-g8fc-j65f- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-369
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-33844
5.5
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
ALPINE-CVE-2021-33844- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
OSVAZL-44017
5.5
CVE-2021-33844 affecting package sox 14.4.2.0-34
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
AZL-44017- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 11 moreShow less
OSVAZL-44664
5.5
CVE-2021-33844 affecting package sox 14.4.2.0-34
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
AZL-44664- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
5.5
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
CVE-2021-33844- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-33844
5.5
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
DEBIAN-CVE-2021-33844- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVOESA-2023-1931
7.8
sox security update
SoX is a cross-platform (Windows, Linux, MacOS X, etc.) command line utility that can convert various formats of computer audio files in to other formats. It can also apply various effects to these sound files, and, as an added bonus, SoX can play and record audio files on most platforms.
Security Fix(es):
A vulnerability was found in SoX, where a heap-buffer-overflow occurs in function lsx_read_w_buf() in formats_i.c file. The vulnerability is exploitable with a crafted file, that could cause an application to crash.(CVE-2021-23159)
A vulnerability was found in SoX, where a heap-buffer-overflow occurs in function startread() in hcom.c file. The vulnerability is exploitable with a crafted hcomn file, that could cause an application to crash.(CVE-2021-23172)
A floating point exception (divide-by-zero) issue was discovered in SoX in functon read_samples() of voc.c file. An attacker with a crafted file, could cause an application to crash.(CVE-2021-23210)
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.(CVE-2021-33844)
A floating point exception vulnerability was found in sox, in the lsx_aiffstartwrite function at sox/src/aiff.c:622:58. This flaw can lead to a denial of service.(CVE-2023-26590)
A floating point exception vulnerability was found in sox, in the read_samples function at sox/src/voc.c:334:18. This flaw can lead to a denial of service.(CVE-2023-32627)
A heap buffer overflow vulnerability was found in sox, in the startread function at sox/src/hcom.c:160:41. This flaw can lead to a denial of service, code execution, or information disclosure.(CVE-2023-34318)
A heap buffer overflow vulnerability was found in sox, in the lsx_readbuf function at sox/src/formats_i.c:98:16. This flaw can lead to a denial of service, code execution, or information disclosure.(CVE-2023-34432)
- Record
OESA-2023-1931- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-33844
5.5
A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.
- Record
UBUNTU-CVE-2021-33844- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2023-0059 No score
Updated sox packages fix security vulnerability
CVE-2019-13590: sox-fmt validation CVE-2021-3643 and CVE-2021-23210: voc validation CVE-2021-23159 and CVE-2021-23172: hcom validation CVE-2021-33844: wav validation CVE-2021-40426: sphere validation CVE-2022-31650: aiff validation CVE-2022-31651: reject implausible rate
- Record
MGASA-2023-0059- Updated
- 2026-11-02
OSVopenSUSE-SU-2023:0328-1 No score
Security update for sox
This update for sox fixes the following issues:
- Apply various fix patches taken from Debian package; it fixes also other entries (CVE-2022-31650 boo#1212060 CVE-2023-34318 boo#1212062 CVE-2023-34432 boo#1212063)
- Fix floating point exception in src/voc.c (CVE-2023-32627 boo#1212061)
- Record
openSUSE-SU-2023:0328-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2023:0329-1 No score
Security update for sox
This update for sox fixes the following issues:
- Apply various fix patches taken from Debian package; it fixes also other entries (CVE-2022-31650 boo#1212060 CVE-2023-34318 boo#1212062 CVE-2023-34432 boo#1212063)
- Fix floating point exception in src/voc.c (CVE-2023-32627 boo#1212061)
- Record
openSUSE-SU-2023:0329-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:13359-1 No score
libsox3-14.4.2-8.1 on GA media
These are all security issues fixed in the libsox3-14.4.2-8.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:13359-1- Updated
- 2026-11-02
OSVUSN-5904-1 No score
sox vulnerabilities
Helmut Grohne discovered that SoX incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, and Ubuntu 18.04 LTS. (CVE-2019-13590)
Helmut Grohne discovered that SoX incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to cause a denial of service. (CVE-2021-23159, CVE-2021-23172, CVE-2021-23210, CVE-2021-33844, CVE-2021-3643, CVE-2021-40426, CVE-2022-31650, and CVE-2022-31651)
- Record
USN-5904-1- Updated
- 2026-11-02
OSVUSN-5904-2 No score
sox regression
USN-5904-1 fixed vulnerabilities in SoX. It was discovered that the fix for CVE-2021-33844 was incomplete. This update fixes the problem.
Original advisory details:
Helmut Grohne discovered that SoX incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, and Ubuntu 18.04 LTS. (CVE-2019-13590)
Helmut Grohne discovered that SoX incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to cause a denial of service. (CVE-2021-23159, CVE-2021-23172, CVE-2021-23210, CVE-2021-33844, CVE-2021-3643, CVE-2021-40426, CVE-2022-31650, and CVE-2022-31651)
- Record
USN-5904-2- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
soxAlpine:v3.18 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAlpine:v3.19 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAlpine:v3.20 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAlpine:v3.21 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAlpine:v3.22 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAlpine:v3.23 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAlpine:v3.24 |
before 14.4.2-r10 | 14.4.2-r10 |
soxAzure Linux:2 |
through 14.4.2.0-34 | None known |
soxAzure Linux:3 |
through 14.4.2.0-34 | None known |
soxDebian:12 |
before 14.4.2+git20190427-3.1 | 14.4.2+git20190427-3.1 |
Show 24 moreShow less
| Package | Affected | Fixed |
|---|---|---|
soxDebian:13 |
before 14.4.2+git20190427-3.1 | 14.4.2+git20190427-3.1 |
soxDebian:10 |
before 14.4.2+git20190427-1+deb10u1, plus listed versions 14.4.2+git20190427-1 |
14.4.2+git20190427-1+deb10u1 |
soxDebian:11 |
before 14.4.2+git20190427-2+deb11u1, plus listed versions 14.4.2+git20190427-2 |
14.4.2+git20190427-2+deb11u1 |
soxMageia:8 |
before 14.4.3-0.git20200117.3.1.mga8 | 14.4.3-0.git20200117.3.1.mga8 |
soxopenEuler:20.03-LTS-SP1 |
before 14.4.2.0-29.oe1 | 14.4.2.0-29.oe1 |
soxopenEuler:20.03-LTS-SP3 |
before 14.4.2.0-29.oe1 | 14.4.2.0-29.oe1 |
soxopenEuler:22.03-LTS |
before 14.4.2.0-29.oe2203sp2 | 14.4.2.0-29.oe2203sp2 |
soxopenEuler:22.03-LTS-SP1 |
before 14.4.2.0-29.oe2203sp1 | 14.4.2.0-29.oe2203sp1 |
soxopenEuler:22.03-LTS-SP2 |
before 14.4.2.0-29.oe2203sp2 | 14.4.2.0-29.oe2203sp2 |
soxUbuntu:Pro:14.04:LTS |
before 14.4.1-3ubuntu1.1+esm2, plus listed versions 14.4.1-314.4.1-3ubuntu114.4.1-3ubuntu1.114.4.1-3ubuntu1.1+esm1 |
14.4.1-3ubuntu1.1+esm2 |
soxUbuntu:Pro:16.04:LTS |
before 14.4.1-5+deb8u4ubuntu0.1+esm1, plus listed versions 14.4.1-514.4.1-5ubuntu0.114.4.1-5ubuntu0.1+esm114.4.1-5+deb8u4ubuntu0.1 |
14.4.1-5+deb8u4ubuntu0.1+esm1 |
soxUbuntu:18.04:LTS |
before 14.4.2-3ubuntu0.18.04.2, plus listed versions 14.4.1-5build114.4.2-214.4.2-314.4.2-3ubuntu0.18.04.1 |
14.4.2-3ubuntu0.18.04.2 |
soxUbuntu:20.04:LTS |
before 14.4.2+git20190427-2+deb11u1build0.20.04.1, plus listed versions 14.4.2+git20190427-1build114.4.2+git20190427-2 |
14.4.2+git20190427-2+deb11u1build0.20.04.1 |
soxUbuntu:22.04:LTS |
before 14.4.2+git20190427-2+deb11u1build0.22.04.1, plus listed versions 14.4.2+git20190427-2 |
14.4.2+git20190427-2+deb11u1build0.22.04.1 |
soxUbuntu:Pro:14.04:LTS |
before 14.4.1-3ubuntu1.1+esm3, plus listed versions 14.4.1-314.4.1-3ubuntu114.4.1-3ubuntu1.114.4.1-3ubuntu1.1+esm114.4.1-3ubuntu1.1+esm2 |
14.4.1-3ubuntu1.1+esm3 |
soxUbuntu:Pro:16.04:LTS |
before 14.4.1-5+deb8u4ubuntu0.1+esm2, plus listed versions 14.4.1-514.4.1-5ubuntu0.114.4.1-5ubuntu0.1+esm114.4.1-5+deb8u4ubuntu0.114.4.1-5+deb8u4ubuntu0.1+esm1 |
14.4.1-5+deb8u4ubuntu0.1+esm2 |
soxUbuntu:18.04:LTS |
before 14.4.2-3ubuntu0.18.04.3, plus listed versions 14.4.1-5build114.4.2-214.4.2-314.4.2-3ubuntu0.18.04.114.4.2-3ubuntu0.18.04.2 |
14.4.2-3ubuntu0.18.04.3 |
soxUbuntu:20.04:LTS |
before 14.4.2+git20190427-2+deb11u2build0.20.04.1, plus listed versions 14.4.2+git20190427-1build114.4.2+git20190427-214.4.2+git20190427-2+deb11u1build0.20.04.1 |
14.4.2+git20190427-2+deb11u2build0.20.04.1 |
soxUbuntu:22.04:LTS |
before 14.4.2+git20190427-2+deb11u2build0.22.04.1, plus listed versions 14.4.2+git20190427-214.4.2+git20190427-2+deb11u1build0.22.04.1 |
14.4.2+git20190427-2+deb11u2build0.22.04.1 |
soxSUSE:Package Hub 15 SP4 |
before 14.4.2-bp154.2.3.1 | 14.4.2-bp154.2.3.1 |
soxopenSUSE:Leap 15.4 |
before 14.4.2-bp154.2.3.1 | 14.4.2-bp154.2.3.1 |
soxSUSE:Package Hub 15 SP5 |
before 14.4.2-bp155.3.3.1 | 14.4.2-bp155.3.3.1 |
soxopenSUSE:Leap 15.5 |
before 14.4.2-bp155.3.3.1 | 14.4.2-bp155.3.3.1 |
soxopenSUSE:Tumbleweed |
before 14.4.2-8.1 | 14.4.2-8.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-33844 is a medium vulnerability (CVSS 5.5) in Sound Exchange Project Exchange, published August 25, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. Fixed in sox 14.4.2-r10.
References
bugzilla.redhat.com/show_bug.cgi?id=1975664
access.redhat.com/security/cve/CVE-2021-33844
sourceforge.net/p/sox/bugs/349
security.archlinux.org/CVE-2021-33844
nvd.nist.gov/vuln/detail/CVE-2021-33844
openwall.com/lists/oss-security/2023/02/03/3
Show 47 moreShow less
openwall.com/lists/oss-security/2023/02/04/2
openwall.com/lists/oss-security/2023/02/05/1
lists.debian.org/debian-lts-announce/2023/02/msg00009.html
openwall.com/lists/oss-security/2023/02/06/1
github.com/advisories/GHSA-3q4f-g8fc-j65f
security.alpinelinux.org/vuln/CVE-2021-33844
security-tracker.debian.org/tracker/CVE-2021-33844
advisories.mageia.org/MGASA-2023-0059.html
bugs.mageia.org/show_bug.cgi?id=30291
talosintelligence.com/vulnerability_reports/TALOS-2021-1434
debian.org/lts/security/2023/dla-3315
openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1931
nvd.nist.gov/vuln/detail/CVE-2021-23159
nvd.nist.gov/vuln/detail/CVE-2021-23172
nvd.nist.gov/vuln/detail/CVE-2021-23210
nvd.nist.gov/vuln/detail/CVE-2023-26590
nvd.nist.gov/vuln/detail/CVE-2023-32627
nvd.nist.gov/vuln/detail/CVE-2023-34318
nvd.nist.gov/vuln/detail/CVE-2023-34432
ubuntu.com/security/CVE-2021-33844
ubuntu.com/security/notices/USN-5904-1
ubuntu.com/security/notices/USN-5904-2
cve.org/CVERecord?id=CVE-2021-33844
ubuntu.com/security/CVE-2019-13590
ubuntu.com/security/CVE-2021-3643
ubuntu.com/security/CVE-2021-23159
ubuntu.com/security/CVE-2021-23172
ubuntu.com/security/CVE-2021-23210
ubuntu.com/security/CVE-2021-40426
ubuntu.com/security/CVE-2022-31650
ubuntu.com/security/CVE-2022-31651
lists.opensuse.org/archives/list/[email protected]/thread/E6JOTRIOEMXEYXNHM2HOXMVP2MMLL3Y6
bugzilla.suse.com/1212060
bugzilla.suse.com/1212061
bugzilla.suse.com/1212062
bugzilla.suse.com/1212063
suse.com/security/cve/CVE-2019-13590
suse.com/security/cve/CVE-2021-23159
suse.com/security/cve/CVE-2021-33844
suse.com/security/cve/CVE-2021-3643
suse.com/security/cve/CVE-2021-40426
suse.com/security/cve/CVE-2022-31650
suse.com/security/cve/CVE-2022-31651
suse.com/security/cve/CVE-2023-32627
suse.com/security/cve/CVE-2023-34318
suse.com/security/cve/CVE-2023-34432
lists.opensuse.org/archives/list/[email protected]/thread/OWH3Y6RJSLCAZ7XAIEM2FMD5E6EQYZM5