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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2011.1220 Low: nfs-utils security, bug fix, and enhancement update 8 December 2011 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: nfs-utils Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Red Hat Enterprise Linux WS/Desktop 6 Linux variants Impact/Access: Unauthorised Access -- Remote/Unauthenticated Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2011-2500 CVE-2011-1749 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2011-1534.html Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running nfs-utils check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: nfs-utils security, bug fix, and enhancement update Advisory ID: RHSA-2011:1534-03 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1534.html Issue date: 2011-12-06 CVE Names: CVE-2011-1749 CVE-2011-2500 ===================================================================== 1. Summary: Updated nfs-utils packages that fix two security issues, various bugs, and add one enhancement are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having low security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 3. Description: The nfs-utils packages provide a daemon for the kernel Network File System (NFS) server, and related tools such as the mount.nfs, umount.nfs, and showmount programs. A flaw was found in the way nfs-utils performed IP based authentication of mount requests. In configurations where a directory was exported to a group of systems using a DNS wildcard or NIS (Network Information Service) netgroup, an attacker could possibly gain access to other directories exported to a specific host or subnet, bypassing intended access restrictions. (CVE-2011-2500) It was found that the mount.nfs tool did not handle certain errors correctly when updating the mtab (mounted file systems table) file. A local attacker could use this flaw to corrupt the mtab file. (CVE-2011-1749) This update also fixes several bugs and adds an enhancement. Documentation for these bug fixes and the enhancement will be available shortly from the Technical Notes document, linked to in the References section. Users of nfs-utils are advised to upgrade to these updated packages, which contain backported patches to resolve these issues and add this enhancement. After installing this update, the nfs service will be restarted automatically. 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/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 692702 - rpc.idmapd sometimes fails to start due to sunrpc 697975 - CVE-2011-1749 nfs-utils: mount.nfs fails to anticipate RLIMIT_FSIZE 702273 - Cannot umount NFS mount containing spaces 715078 - update exports(5) manpage with details about ipv6 configuration 716949 - CVE-2011-2500 nfs-utils: Improper authentication of an incoming request when an IP based authentication used 720479 - nfs-utils-1.2.3 breaks svcgssd - incorrectly orders libraries when built from source 723438 - rpc.mountd can segfault with showmount - REFERENCE TO PATCH THAT FIXES THIS 729001 - Debug file missing in debuginfo package for a binary 747400 - RHEL 6.2 beta rpcdebug has no flag for pNFS debug 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/nfs-utils-1.2.3-15.el6.src.rpm i386: nfs-utils-1.2.3-15.el6.i686.rpm nfs-utils-debuginfo-1.2.3-15.el6.i686.rpm x86_64: nfs-utils-1.2.3-15.el6.x86_64.rpm nfs-utils-debuginfo-1.2.3-15.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/nfs-utils-1.2.3-15.el6.src.rpm x86_64: nfs-utils-1.2.3-15.el6.x86_64.rpm nfs-utils-debuginfo-1.2.3-15.el6.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/nfs-utils-1.2.3-15.el6.src.rpm i386: nfs-utils-1.2.3-15.el6.i686.rpm nfs-utils-debuginfo-1.2.3-15.el6.i686.rpm ppc64: nfs-utils-1.2.3-15.el6.ppc64.rpm nfs-utils-debuginfo-1.2.3-15.el6.ppc64.rpm s390x: nfs-utils-1.2.3-15.el6.s390x.rpm nfs-utils-debuginfo-1.2.3-15.el6.s390x.rpm x86_64: nfs-utils-1.2.3-15.el6.x86_64.rpm nfs-utils-debuginfo-1.2.3-15.el6.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/nfs-utils-1.2.3-15.el6.src.rpm i386: nfs-utils-1.2.3-15.el6.i686.rpm nfs-utils-debuginfo-1.2.3-15.el6.i686.rpm x86_64: nfs-utils-1.2.3-15.el6.x86_64.rpm nfs-utils-debuginfo-1.2.3-15.el6.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-2011-1749.html https://www.redhat.com/security/data/cve/CVE-2011-2500.html https://access.redhat.com/security/updates/classification/#low https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.2_Technical_Notes/nfs-utils.html#RHSA-2011-1534 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFO3jSoXlSAg2UNWIIRApFxAJ9tUhh8zz0/Utv0u8PXlxAOiTADxwCfUqA0 V8lWt2jxpgfmB//Xa/y0FEc= =GR1I - -----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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