PT-2021-6767 · Gpac · Gpac

Published 2021-08-18 · Updated 2022-07-29 · CVE-2021-21845

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions GPAC Project on Advanced Content library version 1.0.1

Description The issue is related to the MPEG-4 decoding functionality of the GPAC library, specifically the stsc decoder. It involves an integer overflow due to unchecked arithmetic, resulting in a heap-based buffer overflow that causes memory corruption. This can be triggered by a specially crafted MPEG-4 input, allowing a remote attacker to access confidential data, compromise its integrity, and cause a denial of service. An attacker can exploit this by convincing a user to open a maliciously crafted video.

Recommendations For GPAC Project on Advanced Content library version 1.0.1, consider disabling the stsc decoder functionality until a patch is available to prevent exploitation. Restrict access to videos from untrusted sources to minimize the risk of triggering the vulnerability. Avoid using the affected library for decoding MPEG-4 content until an update is applied. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Integer Overflow

Weakness Enumeration

CWE-119

CWE-680

CWE-190

Related Identifiers

BDU:2022-02159

CVE-2021-21845

DSA-4966-1

MGASA-2021-0431

Affected Products

Gpac

References · 21

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-21845 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-21845 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-21845 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4966-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-21845 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0431 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-21845 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-21845 · Vendor Advisory
• https://debian.org/security/2021/dsa-4966 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0431.html · Security Note
• https://bdu.fstec.ru/vul/2022-02159 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21845 · Vendor Advisory
• https://github.com/gpac/gpac/commit/b515fd04f5f00f4a99df741042f1efb31ad56351 · Note
• https://github.com/gpac/gpac/issues/1814 · Note