Is CVE-2021-21843 in the CISA KEV catalog?

No. CVE-2021-21843 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-21843?

CVE-2021-21843 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-21843?

CVE-2021-21843 has an EPSS score of 2.02% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-21843?

Upgrade gpac on debian 11 to 1.0.1+dfsg1-4+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2021-21843

HIGHEPSS 79th pctl

8.8

CVSS v3

NVD

Description

Multiple exploitable integer overflow vulnerabilities exist within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input can cause an integer overflow due to unchecked arithmetic resulting in a heap-based buffer overflow that causes memory corruption. After validating the number of ranges, at [41] the library will multiply the count by the size of the GF_SubsegmentRangeInfo structure. On a 32-bit platform, this multiplication can result in an integer overflow causing the space of the array being allocated to be less than expected. An attacker can convince a user to open a video to trigger this vulnerability.

CWE-680 CWE-119Buffer Overflow

How to fix

Remediation Available

gpacDebian

Fixed in:1.0.1+dfsg1-4+deb11u1CVE-2021-21843

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

2.02%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Exploit2

Third-Party Advisory1

debian.org

Embed a live status badge for CVE-2021-21843

Markdown

[![CVE-2021-21843](https://tridentstack.com/cve/badge/CVE-2021-21843.svg)](https://tridentstack.com/cve/CVE-2021-21843)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-21843"><img src="https://tridentstack.com/cve/badge/CVE-2021-21843.svg" alt="CVE-2021-21843"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.