CVE-2026-63090: fallo de gravedad alta en proftpd
ProFTPD mod_sftp Heap Buffer Overflow via SFTP Packet Reassembly
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.7epss 0.9%
ProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privilege attackers to achieve arbitrary code execution by sending crafted SFTP packet fragments exceeding the 16 KB reassembly buffer in the fxp.c component. Attackers can supply oversized fragments to trigger an incorrectly conditioned reallocation, corrupt pool freelist metadata, overwrite the root_fs BSS global pointer to reference a fake filesystem struct, and redirect pr_fsio_stat() to system() via a crafted RENAME request.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Productos afectados
proftpd · proftpdCVEs relacionadas — proftpd
En el mismo producto, de las más peligrosas a las menos.
Referencias
https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTEShttps://github.com/proftpd/proftpd/commit/4ee8701bcf425f11b3b2116e634ff3e655d918b1https://github.com/proftpd/proftpd/issues/2190https://github.com/proftpd/proftpd/releases/tag/v1.3.10rc3-3https://github.com/proftpd/proftpd/releases/tag/v1.3.9chttps://www.vulncheck.com/advisories/proftpd-mod-sftp-heap-buffer-overflow-via-sftp-packet-reassembly