PT-2019-6401 · FFmpeg+4 · Ffmpeg+4

Published 2019-07-04 · Updated 2026-02-06 · CVE-2020-20446

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:N/AC:L/Au:S/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions FFmpeg version 4.2

Description The issue is related to a Divide By Zero problem in the libavcodec/aacpsy.c component of the FFmpeg library. This allows a remote malicious user to cause a Denial of Service. The vulnerability is exploited through the lack of a check for division by zero, enabling an attacker to disrupt service.

Recommendations For FFmpeg version 4.2, consider disabling the libavcodec/aacpsy.c component as a temporary workaround until a patch is available. Restrict access to this component to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Divide By Zero

Weakness Enumeration

CWE-369

Related Identifiers

ALT-PU-2019-2678

ALT-PU-2021-3508

ALT-PU-2021-3575

BDU:2023-07815

CLEANSTART-2026-EZ98723

CLEANSTART-2026-PS82605

CLEANSTART-2026-XE32069

CVE-2020-20446

DLA-2818-1

DSA-4990-1

DSA-4998-1

MGASA-2021-0495

USN-5167-1

USN-5472-1

Affected Products

Alt Linux

Astra Linux

Ffmpeg

Linuxmint

Ubuntu

References · 203

• 🔥 https://trac.ffmpeg.org/ticket/7995 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2018-7751 · Security Note
• https://debian.org/security/2021/dsa-4990 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22020 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-20451 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22021 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22028 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-13305 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-20446 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-13302 · Security Note
• https://ubuntu.com/security/CVE-2020-22025 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22023 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-12284 · Security Note
• https://ubuntu.com/security/CVE-2020-22030 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-22049 · Vendor Advisory