-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-05:06.iir Security Advisory The FreeBSD Project Topic: Incorrect permissions on /dev/iir Category: core Module: sys_dev Announced: 2005-05-06 Credits: Christian S.J. Peron Andre Guibert de Bruet Affects: All FreeBSD 4.x releases since 4.6-RELEASE All FreeBSD 5.x releases prior to 5.4-RELEASE Corrected: 2005-05-06 02:33:46 UTC (RELENG_5, 5.4-STABLE) 2005-05-06 02:34:18 UTC (RELENG_5_4, 5.4-RELEASE) 2005-05-06 02:34:01 UTC (RELENG_5_3, 5.3-RELEASE-p11) 2005-05-06 02:32:54 UTC (RELENG_4, 4.11-STABLE) 2005-05-06 02:33:28 UTC (RELENG_4_11, 4.11-RELEASE-p5) 2005-05-06 02:33:12 UTC (RELENG_4_10, 4.10-RELEASE-p10) CVE Name: CAN-2005-1399 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . 0. Revision History v1.0 2005-05-06 Initial release. v1.1 2005-05-07 Updated credits to include Andre Guibert de Bruet, who was inadvertantly omitted from the original advisory. I. Background The iir(4) driver provides support for the Intel Integrated RAID controllers and ICP Vortex RAID controllers. II. Problem Description The default permissions on the /dev/iir device node allow unprivileged local users to open the device and execute ioctl calls. III. Impact Unprivileged local users can send commands to the hardware supported by the iir(4) driver, allowing destruction of data and possible disclosure of data. IV. Workaround Systems without hardware supported by the iir(4) driver are not affected by this issue. On systems which are affected, as a workaround, the permissions on /dev/iir can be changed manually. As root, execute the following command: # chmod 0600 /dev/iir* On 5.x, the following commands are also needed to ensure that the correct permissions are used after rebooting. # echo 'perm iir* 0600' >> /etc/devfs.conf # echo 'devfs_enable="YES"' >> /etc/rc.conf If the administrator has created additional device nodes, or mounted additional instances of devfs(5) elsewhere in the file system name space, attention should be paid to ensure that either the iir device node is not visible in those name spaces, or is similarly protected. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 4-STABLE or 5-STABLE, or to the RELENG_5_3, RELENG_4_11, or RELENG_4_10 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 4.10, 4.11, and 5.3 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:06/iir.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:06/iir.patch.asc b) Apply the patch. # cd /usr/src # patch < /path/to/patch c) Recompile your kernel as described in and reboot the system. VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_4 src/sys/dev/iir/iir_ctrl.c 1.2.2.5 RELENG_4_11 src/UPDATING 1.73.2.91.2.6 src/sys/conf/newvers.sh 1.44.2.39.2.9 src/sys/dev/iir/iir_ctrl.c 1.2.2.4.12.1 RELENG_4_10 src/UPDATING 1.73.2.90.2.11 src/sys/conf/newvers.sh 1.44.2.34.2.12 src/sys/dev/iir/iir_ctrl.c 1.2.2.4.10.1 RELENG_5 src/sys/dev/iir/iir_ctrl.c 1.15.2.2 RELENG_5_4 src/UPDATING 1.342.2.24.2.5 src/sys/dev/iir/iir_ctrl.c 1.15.2.1.2.1 RELENG_5_3 src/UPDATING 1.342.2.13.2.14 src/sys/conf/newvers.sh 1.62.2.15.2.16 src/sys/dev/iir/iir_ctrl.c 1.15.4.1 - ------------------------------------------------------------------------- The latest revision of this advisory is available at ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:06.iir.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCfEXyFdaIBMps37IRAu6WAJ9qBjsIfH7GGPRiHsvXwlkuau5kswCfXhan YhoUBZ4gHuIXJFM1gOEAyVk= =zRAR -----END PGP SIGNATURE-----