CVE-2020-21724: Buffer Overflow vulnerability in ExtractorInformation function in streamExtractor.cpp in oggvideotools 0.9.1 a

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HIGH 7.8DOWNGRADE

CVE-2020-21724 is a high-severity flaw (CVSS 7.8) affecting ogg video tools. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer Overflow vulnerability in ExtractorInformation function in streamExtractor.cpp in oggvideotools 0.9.1 allows remaote attackers to run arbitrary code via opening of crafted ogg file.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ogg video tools project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-08-22 19:16 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

ogg video tools project ogg video tools DOWNGRADE

Affected: 0.9.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.1

1. Check installed version

apt-cache policy ogg-video-tools || rpm -q ogg-video-tools || ogg-video-tools --version

2. No fixed release: DOWNGRADE to a release before 0.9.1 (Debian / Ubuntu)

apt-cache madison ogg-video-tools sudo apt install ogg-video-tools=<VERSION_BEFORE_0.9.1> sudo apt-mark hold ogg-video-tools

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ogg-video-tools sudo dnf downgrade ogg-video-tools-<VERSION_BEFORE_0.9.1> sudo dnf versionlock add ogg-video-tools

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-21724?

ogg video tools: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-21724 being exploited?

CVE-2020-21724 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-21724 affect?

CVE-2020-21724 affects ogg video tools. Severity is high (CVSS 7.8). Buffer Overflow vulnerability in ExtractorInformation function in streamExtractor.cpp in oggvideotools 0.9.1 allows remaote attackers to run arbitrary code via opening of crafted ogg file.

How urgent is CVE-2020-21724?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2020-21723 MEDIUM 5.5 DOWNGRADE A Segmentation Fault issue discovered StreamSerializer::extractStreams function in streamSerializer.cpp in ogg
CVE-2020-21722 HIGH 7.8 DOWNGRADE Buffer Overflow vulnerability in oggvideotools 0.9.1 allows remote attackers to run arbitrary code via opening

References

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