CVE-2013-6442

La función owner_set en smbcacls.c en smbcacls en Samba 4.0.x anterior a 4.0.16 y 4.1.x anterior a 4.1.6 elimina una ACL durante el uso de una opción de --chown o --chgrp, lo que permite a atacantes remotos evadir restricciones de acceso en circunstancias oportunistas mediante el aprovechamiento de un cambio de administrativo no intencionado.

Samba is an open-source implementation of the Server Message Block or Common Internet File System protocol, which allows PC-compatible machines to share files, printers, and other information. It was found that certain Samba configurations did not enforce the password lockout mechanism. A remote attacker could use this flaw to perform password guessing attacks on Samba user accounts. Note: this flaw only affected Samba when deployed as a Primary Domain Controller. A flaw was found in Samba's "smbcacls" command, which is used to set or get ACLs on SMB file shares. Certain command line options of this command would incorrectly remove an ACL previously applied on a file or a directory, leaving the file or directory without the intended ACL.