CVE-2021-21848

An exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The library will actually reuse the parser for atoms with the “stsz” FOURCC code when parsing atoms that use the “stz2” FOURCC code and can cause an integer overflow due to unchecked arithmetic resulting in a heap-based buffer overflow that causes memory corruption. An attacker can convince a user to open a video to trigger this vulnerability.

CVSS v3.1

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

CVSS v3.0

8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

1.70% chance of exploitation in the next 30 days, 76th percentile

Published

2021-08-25

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297

References

• CVE Record
• NVD entry

Related

• CVE-2021-21847
• CVE-2021-21849
• CVE-2021-21846
• CVE-2021-21850
• CVE-2021-21845
• CVE-2021-21851