Date: Thu, 27 May 2010 03:15:05 +0000 (UTC) From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r208586 - head/contrib/opie/libopie head/lib/libc/sys head/sys/nfsclient head/usr.sbin/jail releng/6.4 releng/6.4/contrib/opie/libopie releng/6.4/sys/conf releng/7.1 releng/7.1/contrib/... Message-ID: <201005270315.o4R3F5HX041621@svn.freebsd.org>
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Author: cperciva Date: Thu May 27 03:15:04 2010 New Revision: 208586 URL: http://svn.freebsd.org/changeset/base/208586 Log: Change the current working directory to be inside the jail created by the jail(8) command. [10:04] Fix a one-NUL-byte buffer overflow in libopie. [10:05] Correctly sanity-check a buffer length in nfs mount. [10:06] Approved by: so (cperciva) Approved by: re (kensmith) Security: FreeBSD-SA-10:04.jail Security: FreeBSD-SA-10:05.opie Security: FreeBSD-SA-10:06.nfsclient Modified: stable/8/contrib/opie/libopie/readrec.c stable/8/lib/libc/sys/mount.2 stable/8/sys/nfsclient/nfs_vfsops.c stable/8/usr.sbin/jail/jail.c Changes in other areas also in this revision: Modified: head/contrib/opie/libopie/readrec.c head/lib/libc/sys/mount.2 head/sys/nfsclient/nfs_vfsops.c head/usr.sbin/jail/jail.c releng/6.4/UPDATING releng/6.4/contrib/opie/libopie/readrec.c releng/6.4/sys/conf/newvers.sh releng/7.1/UPDATING releng/7.1/contrib/opie/libopie/readrec.c releng/7.1/sys/conf/newvers.sh releng/7.2/UPDATING releng/7.2/contrib/opie/libopie/readrec.c releng/7.2/lib/libc/sys/mount.2 releng/7.2/sys/conf/newvers.sh releng/7.2/sys/nfsclient/nfs_vfsops.c releng/7.3/UPDATING releng/7.3/contrib/opie/libopie/readrec.c releng/7.3/lib/libc/sys/mount.2 releng/7.3/sys/conf/newvers.sh releng/7.3/sys/nfsclient/nfs_vfsops.c releng/8.0/UPDATING releng/8.0/contrib/opie/libopie/readrec.c releng/8.0/lib/libc/sys/mount.2 releng/8.0/sys/conf/newvers.sh releng/8.0/sys/nfsclient/nfs_vfsops.c releng/8.0/usr.sbin/jail/jail.c stable/6/contrib/opie/libopie/readrec.c stable/7/contrib/opie/libopie/readrec.c stable/7/lib/libc/sys/mount.2 stable/7/sys/nfsclient/nfs_vfsops.c Modified: stable/8/contrib/opie/libopie/readrec.c ============================================================================== --- stable/8/contrib/opie/libopie/readrec.c Thu May 27 01:27:25 2010 (r208585) +++ stable/8/contrib/opie/libopie/readrec.c Thu May 27 03:15:04 2010 (r208586) @@ -141,10 +141,8 @@ int __opiereadrec FUNCTION((opie), struc if (c = strchr(opie->opie_principal, ':')) *c = 0; - if (strlen(opie->opie_principal) > OPIE_PRINCIPAL_MAX) - (opie->opie_principal)[OPIE_PRINCIPAL_MAX] = 0; - strcpy(principal, opie->opie_principal); + strlcpy(principal, opie->opie_principal, sizeof(principal)); do { if ((opie->opie_recstart = ftell(f)) < 0) Modified: stable/8/lib/libc/sys/mount.2 ============================================================================== --- stable/8/lib/libc/sys/mount.2 Thu May 27 01:27:25 2010 (r208585) +++ stable/8/lib/libc/sys/mount.2 Thu May 27 03:15:04 2010 (r208586) @@ -107,7 +107,7 @@ This restriction can be removed by setti .Va vfs.usermount .Xr sysctl 8 variable -to a non-zero value. +to a non-zero value; see the BUGS section for more information. .Pp The following .Fa flags @@ -370,3 +370,10 @@ functions appeared in .At v6 . .Sh BUGS Some of the error codes need translation to more obvious messages. +.Pp +Allowing untrusted users to mount arbitrary media, e.g. by enabling +.Va vfs.usermount , +should not be considered safe. +Most file systems in +.Fx +were not built to safeguard against malicious devices. Modified: stable/8/sys/nfsclient/nfs_vfsops.c ============================================================================== --- stable/8/sys/nfsclient/nfs_vfsops.c Thu May 27 01:27:25 2010 (r208585) +++ stable/8/sys/nfsclient/nfs_vfsops.c Thu May 27 03:15:04 2010 (r208586) @@ -1074,6 +1074,11 @@ nfs_mount(struct mount *mp) error = EINVAL; goto out; } + if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { + vfs_mount_error(mp, "Bad file handle"); + error = EINVAL; + goto out; + } if (mp->mnt_flag & MNT_UPDATE) { struct nfsmount *nmp = VFSTONFS(mp); Modified: stable/8/usr.sbin/jail/jail.c ============================================================================== --- stable/8/usr.sbin/jail/jail.c Thu May 27 01:27:25 2010 (r208585) +++ stable/8/usr.sbin/jail/jail.c Thu May 27 03:15:04 2010 (r208586) @@ -511,6 +511,10 @@ set_param(const char *name, char *value) *value++ = '\0'; } + /* jail_set won't chdir along with its chroot, so do it here. */ + if (!strcmp(name, "path") && chdir(value) < 0) + err(1, "chdir: %s", value); + /* Check for repeat parameters */ for (i = 0; i < nparams; i++) if (!strcmp(name, params[i].jp_name)) {
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