news 28 Posted November 1, 2010 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: pam security update Advisory ID: RHSA-2010:0819-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0819.html Issue date: 2010-11-01 CVE Names: CVE-2010-3316 CVE-2010-3435 CVE-2010-3853 ===================================================================== 1. Summary: Updated pam packages that fix three security issues are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate 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: RHEL Desktop Workstation (v. 5 client) - i386, x86_64 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: Pluggable Authentication Modules (PAM) provide a system whereby administrators can set up authentication policies without having to recompile programs that handle authentication. It was discovered that the pam_namespace module executed the external script namespace.init with an unchanged environment inherited from an application calling PAM. In cases where such an environment was untrusted (for example, when pam_namespace was configured for setuid applications such as su or sudo), a local, unprivileged user could possibly use this flaw to escalate their privileges. (CVE-2010-3853) It was discovered that the pam_mail module used root privileges while accessing users' files. In certain configurations, a local, unprivileged user could use this flaw to obtain limited information about files or directories that they do not have access to. (CVE-2010-3435) It was discovered that the pam_xauth module did not verify the return values of the setuid() and setgid() system calls. A local, unprivileged user could use this flaw to execute the xauth command with root privileges and make it read an arbitrary input file. (CVE-2010-3316) Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting the CVE-2010-3435 issue. All pam users should upgrade to these updated packages, which contain backported patches to correct these issues. 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 http://kbase.redhat.com/faq/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 637898 - CVE-2010-3316 pam: pam_xauth missing return value checks from setuid() and similar calls 641335 - CVE-2010-3435 pam: pam_env and pam_mail accessing users' file with root privileges 643043 - CVE-2010-3853 pam: pam_namespace executes namespace.init with service's environment 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/pam-0.99.6.2-6.el5_5.2.src.rpm i386: pam-0.99.6.2-6.el5_5.2.i386.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm x86_64: pam-0.99.6.2-6.el5_5.2.i386.rpm pam-0.99.6.2-6.el5_5.2.x86_64.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.x86_64.rpm RHEL Desktop Workstation (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/pam-0.99.6.2-6.el5_5.2.src.rpm i386: pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm pam-devel-0.99.6.2-6.el5_5.2.i386.rpm x86_64: pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.x86_64.rpm pam-devel-0.99.6.2-6.el5_5.2.i386.rpm pam-devel-0.99.6.2-6.el5_5.2.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/pam-0.99.6.2-6.el5_5.2.src.rpm i386: pam-0.99.6.2-6.el5_5.2.i386.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm pam-devel-0.99.6.2-6.el5_5.2.i386.rpm ia64: pam-0.99.6.2-6.el5_5.2.i386.rpm pam-0.99.6.2-6.el5_5.2.ia64.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.ia64.rpm pam-devel-0.99.6.2-6.el5_5.2.ia64.rpm ppc: pam-0.99.6.2-6.el5_5.2.ppc.rpm pam-0.99.6.2-6.el5_5.2.ppc64.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.ppc.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.ppc64.rpm pam-devel-0.99.6.2-6.el5_5.2.ppc.rpm pam-devel-0.99.6.2-6.el5_5.2.ppc64.rpm s390x: pam-0.99.6.2-6.el5_5.2.s390.rpm pam-0.99.6.2-6.el5_5.2.s390x.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.s390.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.s390x.rpm pam-devel-0.99.6.2-6.el5_5.2.s390.rpm pam-devel-0.99.6.2-6.el5_5.2.s390x.rpm x86_64: pam-0.99.6.2-6.el5_5.2.i386.rpm pam-0.99.6.2-6.el5_5.2.x86_64.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.i386.rpm pam-debuginfo-0.99.6.2-6.el5_5.2.x86_64.rpm pam-devel-0.99.6.2-6.el5_5.2.i386.rpm pam-devel-0.99.6.2-6.el5_5.2.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://www.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2010-3316.html https://www.redhat.com/security/data/cve/CVE-2010-3435.html https://www.redhat.com/security/data/cve/CVE-2010-3853.html http://www.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is . More contact details at https://www.redhat.com/security/team/contact/ Copyright 2010 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFMzxqFXlSAg2UNWIIRArfBAJ9qcKIF/IydoOYO6Ol3sJXkRoCtFwCfYCuV GH2MTJIBmimm9XsTiJvPTJI= =22g0 -----END PGP SIGNATURE----- -- Share this post Link to post
