Red Hat Security Advisory: kernel security and bug fix update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1445 Final 1 1 2012-11-13T13:41:00Z Current version 2012-11-13T13:41:00Z 2012-11-13T13:41:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-11-13T15:43:01Z Updated kernel packages that fix one security issue and several bugs are 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. The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: * It was found that the RHSA-2010:0178 update did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. (CVE-2012-2100, Low) This update also fixes several bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section. Users should upgrade to these updated packages, which contain backported patches to correct this issue, and fix the bugs noted in the Technical Notes. The system must be rebooted for this update to take effect. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Low https://rhn.redhat.com/errata/RHSA-2012-1445.html https://rhn.redhat.com/errata/RHSA-2012-1445.html https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/security/updates/classification/#low https://rhn.redhat.com/errata/RHSA-2010-0178.html https://rhn.redhat.com/errata/RHSA-2010-0178.html https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.8_Technical_Notes/kernel.html#RHSA-2012-1445 https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.8_Technical_Notes/kernel.html#RHSA-2012-1445 https://bugzilla.redhat.com/show_bug.cgi?id=859946 https://bugzilla.redhat.com/show_bug.cgi?id=859946 Red Hat Enterprise Linux Desktop (v. 5 client) Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-308.20.1.el5.src.rpm kernel-2.6.18-308.20.1.el5 as a component of Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-308.20.1.el5 as a component of Red Hat Enterprise Linux (v. 5 server) It was found that the RHSA-2010:0178 update did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. 2012-04-04T00:00:00Z 2012-01-10T00:00:00Z CVE-2012-2100 5Client-5.8.Z:kernel-2.6.18-308.20.1.el5 5Server-5.8.Z:kernel-2.6.18-308.20.1.el5 Low 4.0 AV:L/AC:H/Au:N/C:N/I:N/A:C 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 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. https://rhn.redhat.com/errata/RHSA-2012-1445.html https://www.redhat.com/security/data/cve/CVE-2012-2100.html CVE-2012-2100 https://bugzilla.redhat.com/show_bug.cgi?id=809687 bz#809687: CVE-2012-2100 kernel: ext4: fix inconsistency in ext4_fill_flex_info()