CVE-2021-21849

An exploitable integer overflow vulnerability exists 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 when the library encounters an atom using the “tfra” FOURCC code 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.

An exploitable integer overflow vulnerability exists 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 when the library encounters an atom using the “tfra” FOURCC code 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.

Se presenta una vulnerabilidad de desbordamiento de enteros explotable dentro de la funcionalidad MPEG-4 decoding de GPAC Project on Advanced Content library v1.0.1. Una entrada MPEG-4 especialmente diseñada puede causar un desbordamiento de enteros cuando la biblioteca encuentra un átomo usando el código FOURCC "tfra" debido a una aritmética no comprobada, resultando en un desbordamiento del búfer en la región heap de la memoria que causa una corrupción de la memoria. Un atacante puede convencer a un usuario de que abra un vídeo para desencadenar esta vulnerabilidad.