CVE-2021-21848

2021-08-2518:24:53

CWE-680

talos

www.cve.org

integer overflow

gpac project

mpeg-4 decoding

fourcc code

heap-based buffer overflow

memory corruption

video vulnerability

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.002

Percentile

58.6%

JSON

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.

CNA Affected

[
  {
    "product": "GPAC Project",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304,GPAC Project Advanced Content v1.0.1"
      }
    ]
  }
]