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===================================================================== Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2010:0723-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0723.html Issue date: 2010-09-29 CVE Names: CVE-2010-1083 CVE-2010-2492 CVE-2010-2798 CVE-2010-2938 CVE-2010-2942 CVE-2010-2943 CVE-2010-3015 =====================================================================
1. Summary:
Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5.
The Red Hat Security Response Team has rated this update as having important 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 (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issues:
* A buffer overflow flaw was found in the ecryptfs_uid_hash() function in the Linux kernel eCryptfs implementation. On systems that have the eCryptfs netlink transport (Red Hat Enterprise Linux 5 does) or where the "/dev/ecryptfs" file has world writable permissions (which it does not, by default, on Red Hat Enterprise Linux 5), a local, unprivileged user could use this flaw to cause a denial of service or possibly escalate their privileges. (CVE-2010-2492, Important)
* A miscalculation of the size of the free space of the initial directory entry in a directory leaf block was found in the Linux kernel Global File System 2 (GFS2) implementation. A local, unprivileged user with write access to a GFS2-mounted file system could perform a rename operation on that file system to trigger a NULL pointer dereference, possibly resulting in a denial of service or privilege escalation. (CVE-2010-2798, Important)
* A flaw was found in the Xen hypervisor implementation when running a system that has an Intel CPU without Extended Page Tables (EPT) support. While attempting to dump information about a crashing fully-virtualized guest, the flaw could cause the hypervisor to crash the host as well. A user with permissions to configure a fully-virtualized guest system could use this flaw to crash the host. (CVE-2010-2938, Moderate)
* Information leak flaws were found in the Linux kernel's Traffic Control Unit implementation. A local attacker could use these flaws to cause the kernel to leak kernel memory to user-space, possibly leading to the disclosure of sensitive information. (CVE-2010-2942, Moderate)
* A flaw was found in the Linux kernel's XFS file system implementation. The file handle lookup could return an invalid inode as valid. If an XFS file system was mounted via NFS (Network File System), a local attacker could access stale data or overwrite existing data that reused the inodes. (CVE-2010-2943, Moderate)
* An integer overflow flaw was found in the extent range checking code in the Linux kernel's ext4 file system implementation. A local, unprivileged user with write access to an ext4-mounted file system could trigger this flaw by writing to a file at a very large file offset, resulting in a local denial of service. (CVE-2010-3015, Moderate)
* An information leak flaw was found in the Linux kernel's USB implementation. Certain USB errors could result in an uninitialized kernel buffer being sent to user-space. An attacker with physical access to a target system could use this flaw to cause an information leak. (CVE-2010-1083, Low)
Red Hat would like to thank Andre Osterhues for reporting CVE-2010-2492; Grant Diffey of CenITex for reporting CVE-2010-2798; Toshiyuki Okajima for reporting CVE-2010-3015; and Marcus Meissner for reporting CVE-2010-1083.
This update also fixes several bugs. Documentation for these bug fixes will be available shortly from the Technical Notes document linked to in the References.
Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.
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
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.
5. Bugs fixed (http://bugzilla.redhat.com/):
566624 - CVE-2010-1083 kernel: information leak via userspace USB interface 611385 - CVE-2010-2492 kernel: ecryptfs_uid_hash() buffer overflow 620300 - CVE-2010-2798 kernel: gfs2: rename causes kernel panic 620490 - CVE-2010-2938 kernel: guest crashes on non-EPT machines may crash the host as well 620661 - ips driver sleeps while holding spin_lock [rhel-5.5.z] 621940 - Significant MSI performance issue due to redundant interrupt masking [rhel-5.5.z] 623141 - High CPU overhead from mapping/unmapping the zero page [rhel-5.5.z] 623143 - [5u6] Bonding in ALB mode sends ARP in loop [rhel-5.5.z] 624327 - CVE-2010-3015 kernel: integer overflow in ext4_ext_get_blocks() 624365 - cpu flags missing from /proc/cpuinfo [rhel-5.5.z] 624369 - need to backport 2e3219b5c8a2e44e0b83ae6e04f52f20a82ac0f2 [rhel-5.5.z] 624903 - CVE-2010-2942 kernel: net sched: fix some kernel memory leaks 624923 - CVE-2010-2943 kernel: xfs: validate inode numbers in file handles correctly 627194 - dasd: force online does not work. [rhel-5.5.z] 627195 - dasd: allocate fallback cqr for reserve/release [rhel-5.5.z] 629219 - [rhel5.6] XFS incorrectly validates inodes [rhel-5.5.z] 630978 - Detect and recover from cxgb3 adapter parity errors [rhel-5.5.z]
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
Source: kernel-2.6.18-194.17.1.el5.src.rpm
i386: kernel-2.6.18-194.17.1.el5.i686.rpm kernel-PAE-2.6.18-194.17.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-PAE-devel-2.6.18-194.17.1.el5.i686.rpm kernel-debug-2.6.18-194.17.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-debug-devel-2.6.18-194.17.1.el5.i686.rpm kernel-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.i686.rpm kernel-devel-2.6.18-194.17.1.el5.i686.rpm kernel-headers-2.6.18-194.17.1.el5.i386.rpm kernel-xen-2.6.18-194.17.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-xen-devel-2.6.18-194.17.1.el5.i686.rpm
noarch: kernel-doc-2.6.18-194.17.1.el5.noarch.rpm
x86_64: kernel-2.6.18-194.17.1.el5.x86_64.rpm kernel-debug-2.6.18-194.17.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-194.17.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-194.17.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.x86_64.rpm kernel-devel-2.6.18-194.17.1.el5.x86_64.rpm kernel-headers-2.6.18-194.17.1.el5.x86_64.rpm kernel-xen-2.6.18-194.17.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-194.17.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-194.17.1.el5.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: kernel-2.6.18-194.17.1.el5.src.rpm
i386: kernel-2.6.18-194.17.1.el5.i686.rpm kernel-PAE-2.6.18-194.17.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-PAE-devel-2.6.18-194.17.1.el5.i686.rpm kernel-debug-2.6.18-194.17.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-debug-devel-2.6.18-194.17.1.el5.i686.rpm kernel-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.i686.rpm kernel-devel-2.6.18-194.17.1.el5.i686.rpm kernel-headers-2.6.18-194.17.1.el5.i386.rpm kernel-xen-2.6.18-194.17.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-194.17.1.el5.i686.rpm kernel-xen-devel-2.6.18-194.17.1.el5.i686.rpm
ia64: kernel-2.6.18-194.17.1.el5.ia64.rpm kernel-debug-2.6.18-194.17.1.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.ia64.rpm kernel-debug-devel-2.6.18-194.17.1.el5.ia64.rpm kernel-debuginfo-2.6.18-194.17.1.el5.ia64.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.ia64.rpm kernel-devel-2.6.18-194.17.1.el5.ia64.rpm kernel-headers-2.6.18-194.17.1.el5.ia64.rpm kernel-xen-2.6.18-194.17.1.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-194.17.1.el5.ia64.rpm kernel-xen-devel-2.6.18-194.17.1.el5.ia64.rpm
noarch: kernel-doc-2.6.18-194.17.1.el5.noarch.rpm
ppc: kernel-2.6.18-194.17.1.el5.ppc64.rpm kernel-debug-2.6.18-194.17.1.el5.ppc64.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.ppc64.rpm kernel-debug-devel-2.6.18-194.17.1.el5.ppc64.rpm kernel-debuginfo-2.6.18-194.17.1.el5.ppc64.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.ppc64.rpm kernel-devel-2.6.18-194.17.1.el5.ppc64.rpm kernel-headers-2.6.18-194.17.1.el5.ppc.rpm kernel-headers-2.6.18-194.17.1.el5.ppc64.rpm kernel-kdump-2.6.18-194.17.1.el5.ppc64.rpm kernel-kdump-debuginfo-2.6.18-194.17.1.el5.ppc64.rpm kernel-kdump-devel-2.6.18-194.17.1.el5.ppc64.rpm
s390x: kernel-2.6.18-194.17.1.el5.s390x.rpm kernel-debug-2.6.18-194.17.1.el5.s390x.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.s390x.rpm kernel-debug-devel-2.6.18-194.17.1.el5.s390x.rpm kernel-debuginfo-2.6.18-194.17.1.el5.s390x.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.s390x.rpm kernel-devel-2.6.18-194.17.1.el5.s390x.rpm kernel-headers-2.6.18-194.17.1.el5.s390x.rpm kernel-kdump-2.6.18-194.17.1.el5.s390x.rpm kernel-kdump-debuginfo-2.6.18-194.17.1.el5.s390x.rpm kernel-kdump-devel-2.6.18-194.17.1.el5.s390x.rpm
x86_64: kernel-2.6.18-194.17.1.el5.x86_64.rpm kernel-debug-2.6.18-194.17.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-194.17.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-194.17.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-194.17.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-194.17.1.el5.x86_64.rpm kernel-devel-2.6.18-194.17.1.el5.x86_64.rpm kernel-headers-2.6.18-194.17.1.el5.x86_64.rpm kernel-xen-2.6.18-194.17.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-194.17.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-194.17.1.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://www.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2010-1083.html https://www.redhat.com/security/data/cve/CVE-2010-2492.html https://www.redhat.com/security/data/cve/CVE-2010-2798.html https://www.redhat.com/security/data/cve/CVE-2010-2938.html https://www.redhat.com/security/data/cve/CVE-2010-2942.html https://www.redhat.com/security/data/cve/CVE-2010-2943.html https://www.redhat.com/security/data/cve/CVE-2010-3015.html http://www.redhat.com/security/updates/classification/#important kernel.html#id3512212
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact details at https://www.redhat.com/security/team/contact/
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