CVE-2026-68768
Gravedad CVSS v4.0:
MEDIA
Tipo:
CWE-120
Copia de búfer sin comprobación del tamaño de entrada (Desbordamiento de búfer clásico)
Fecha de publicación:
22/08/2026
Última modificación:
24/08/2026
Descripción
*** Pendiente de traducción *** hashcat contains a heap-based buffer overflow (out-of-bounds write) in the outfile_write() function in src/outfile.c. When assembling output into a fixed-size buffer (HCBUFSIZ_LARGE, ~16 MB), the function sequentially appends the username, separator, hash, and plaintext via memcpy without validating that the accumulated length stays within the buffer capacity. When run with --username --show against a crafted hash file containing an oversized username that nearly fills the buffer, the total assembled output exceeds the buffer, causing a heap buffer overflow that can corrupt memory and crash the process.
Impacto
Puntuación base 4.0
6.90
Gravedad 4.0
MEDIA
Puntuación base 3.x
6.10
Gravedad 3.x
MEDIA
Referencias a soluciones, herramientas e información
- https://github.com/hashcat/hashcat
- https://github.com/hashcat/hashcat/blob/v7.1.2/src/outfile.c#L654-L668
- https://github.com/hashcat/hashcat/commit/68f56a2d8712867a8520bf4dcf07f6145c23df89
- https://github.com/hashcat/hashcat/issues/4740
- https://www.vulncheck.com/advisories/hashcat-through-heap-buffer-overflow-in-outfile-write-via-oversized-username
- https://github.com/hashcat/hashcat/issues/4740