UBUNTU-CVE-2019-9721

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Source
https://ubuntu.com/security/CVE-2019-9721
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9721.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2019-9721
Upstream
Downstream
Related
Published
2019-03-12T00:00:00Z
Modified
2025-09-08T16:45:20Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because handleopenbrace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

References

Affected packages

Ubuntu:18.04:LTS / ffmpeg

Package

Name
ffmpeg
Purl
pkg:deb/ubuntu/ffmpeg@7:3.4.6-0ubuntu0.18.04.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7:3.4.6-0ubuntu0.18.04.1

Affected versions

7:3.*

7:3.3.4-2
7:3.3.4-2build3
7:3.4-2ubuntu2
7:3.4-4
7:3.4-4build1
7:3.4.1-1
7:3.4.1-1build1
7:3.4.2-1
7:3.4.2-1build1
7:3.4.2-2
7:3.4.4-0ubuntu0.18.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "ffmpeg"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavcodec-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavcodec-extra"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavcodec-extra57"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavcodec57"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavdevice-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavdevice57"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavfilter-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavfilter-extra"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavfilter-extra6"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavfilter6"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavformat-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavformat57"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavresample-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavresample3"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavutil-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libavutil55"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libpostproc-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libpostproc54"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libswresample-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libswresample2"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libswscale-dev"
        },
        {
            "binary_version": "7:3.4.6-0ubuntu0.18.04.1",
            "binary_name": "libswscale4"
        }
    ],
    "availability": "No subscription required"
}