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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0046 Low: autofs security, bug fix, and enhancement update 9 January 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: autofs Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 5 Red Hat Enterprise Linux WS/Desktop 5 Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2012-2697 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2013-0132.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: autofs security, bug fix, and enhancement update Advisory ID: RHSA-2013:0132-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0132.html Issue date: 2013-01-08 CVE Names: CVE-2012-2697 ===================================================================== 1. Summary: An updated autofs package that fixes one security issue, several bugs, and adds one enhancement is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 3. Description: The autofs utility controls the operation of the automount daemon. The automount daemon automatically mounts and unmounts file systems. A bug fix included in RHBA-2012:0264 introduced a denial of service flaw in autofs. When using autofs with LDAP, a local user could use this flaw to crash autofs, preventing future mount requests from being processed until the autofs service was restarted. Note: This flaw did not impact existing mounts (except for preventing mount expiration). (CVE-2012-2697) Red Hat would like to thank Ray Rocker for reporting this issue. This update also fixes the following bugs: * The autofs init script sometimes timed out waiting for the automount daemon to exit and returned a shutdown failure if the daemon failed to exit in time. To resolve this problem, the amount of time that the init script waits for the daemon has been increased to allow for cases where servers are slow to respond or there are many active mounts. (BZ#585058) * Due to an omission when backporting a change, autofs attempted to download the entire LDAP map at startup. This mistake has now been corrected. (BZ#767428) * A function to check the validity of a mount location was meant to check only for a small subset of map location errors. A recent modification in error reporting inverted a logic test in this validating function. Consequently, the scope of the test was widened, which caused the automount daemon to report false positive failures. With this update, the faulty logic test has been corrected and false positive failures no longer occur. (BZ#798448) * When there were many attempts to access invalid or non-existent keys, the automount daemon used excessive CPU resources. As a consequence, systems sometimes became unresponsive. The code has been improved so that automount checks for invalid keys earlier in the process which has eliminated a significant amount of the processing overhead. (BZ#847101) * The auto.master(5) man page did not document the "-t, --timeout" option in the FORMAT options section. This update adds this information to the man page. (BZ#859890) This update also adds the following enhancement: * Previously, it was not possible to configure separate timeout values for individual direct map entries in the autofs master map. This update adds this functionality. (BZ#690404) All users of autofs are advised to upgrade to this updated package, which contains backported patches to correct these issues and add this enhancement. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 585058 - autofs5 init script times out before automount exits and incorrectly shows that autofs5 stop failed 643142 - "/net -hosts -fstype=nfs4" does not work while "/home /etc/auto.nfs4" works. 690404 - RFE: timeout option cannot be configured individually with multiple direct map entries 831772 - CVE-2012-2697 autofs: denial of service when using an LDAP-based automount map 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/autofs-5.0.1-0.rc2.177.el5.src.rpm i386: autofs-5.0.1-0.rc2.177.el5.i386.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.i386.rpm x86_64: autofs-5.0.1-0.rc2.177.el5.x86_64.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/autofs-5.0.1-0.rc2.177.el5.src.rpm i386: autofs-5.0.1-0.rc2.177.el5.i386.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.i386.rpm ia64: autofs-5.0.1-0.rc2.177.el5.ia64.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.ia64.rpm ppc: autofs-5.0.1-0.rc2.177.el5.ppc.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.ppc.rpm s390x: autofs-5.0.1-0.rc2.177.el5.s390x.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.s390x.rpm x86_64: autofs-5.0.1-0.rc2.177.el5.x86_64.rpm autofs-debuginfo-5.0.1-0.rc2.177.el5.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2012-2697.html https://access.redhat.com/security/updates/classification/#low https://rhn.redhat.com/errata/RHBA-2012-0264.html 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2013 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFQ68T1XlSAg2UNWIIRAs5RAKDENuZbtGmojWqgCR6YGwmZv8KdCACgispJ DX66cYLD33Lwva6Aq9YRLqY= =lr+T - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUO0Pxu4yVqjM2NGpAQK+HxAArHNDxz7ZRt4QCgjfLYLTSEUWkPhlI1EH ymJ1p+Inru56FrmSRnZL263LdYFUaKZoDqJJksAcvD+y/Wc/IpajlVhuCTvjs1wl TgG/+mSZsizrn9LRnubASAEucHN86QnO08aMSJ+IUKgK+prJiqBmP+G0pf8fLSNm CowdnDhBGOLQoIriDW707a/meRcl43ApStiCP0niAIvcSw5dZrQKzQBkNgcnuLz+ QB4L2hb5LaZxfl6ZhZawBnIHmkM8/m70USxBc4foeKkAzchyL5fy4gmal+lQBZcJ zYV9Hcs0ke0dtRXRba0xr2ELRqCU/lssEplfA4f0ywMPV1ffk4DM/RzbqX6vYVeY amEdhj0qXf1BzDqSZwjm7w04o2vhViUsTAeHWqIxot2Cswae62tCrxPswgn2EaLr M8c/fo8JPyi94oeSGjKT4albOo86mCy9Gp9uQjFDtFfhiItceQyFuD47LwdFEW1d TLGwBzY2RNOCUFHj5YZzAiw/Qb/enCg2mGFqO73BizaN5GOHgl6wv1m/FaY8eHoV d3GaWs/oLy9C8WESkwkRib170CZDDksDR0Q/4/+PJ6I34Oq0SYu3oAf6+krDJdKm OtPR1/Bz5N4urW31rttpM7BgwLXArZajAs4hZ8vrYU0oo5riK5m0NM/ALunh1+Fk EqOE0q9w7LE= =DkAg -----END PGP SIGNATURE-----