Author: emaste Date: Wed Mar 21 23:26:42 2018 New Revision: 331329 URL: https://svnweb.freebsd.org/changeset/base/331329
Log: Fix kernel memory disclosure in ibcs2_getdents ibcs2_getdents() copies a dirent structure to userland. The ibcs2 dirent structure contains a 2 byte pad element. This element is never initialized, but copied to userland none-the-less. Note that ibcs2 has not built on HEAD since r302095. Submitted by: Domagoj Stolfa <[email protected]> Reported by: Ilja Van Sprundel <[email protected]> MFC after: 3 days Security: Kernel memory disclosure (803) Modified: head/sys/i386/ibcs2/ibcs2_misc.c Modified: head/sys/i386/ibcs2/ibcs2_misc.c ============================================================================== --- head/sys/i386/ibcs2/ibcs2_misc.c Wed Mar 21 23:21:32 2018 (r331328) +++ head/sys/i386/ibcs2/ibcs2_misc.c Wed Mar 21 23:26:42 2018 (r331329) @@ -330,6 +330,7 @@ ibcs2_getdents(struct thread *td, struct ibcs2_getdent #define BSD_DIRENT(cp) ((struct dirent *)(cp)) #define IBCS2_RECLEN(reclen) (reclen + sizeof(u_short)) + memset(&idb, 0, sizeof(idb)); error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_READ), &fp); if (error != 0) return (error); _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "[email protected]"
