08 May 2008
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0470 -- [Linux][RedHat] Important: kernel security and bug fix update 8 May 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Linux 5 Linux variants Impact: Execute Arbitrary Code/Commands Denial of Service Increased Privileges Access: Existing Account CVE Names: CVE-2008-1669 CVE-2008-1619 CVE-2008-1375 CVE-2008-1367 CVE-2008-0007 CVE-2007-5498 Ref: ESB-2008.0451 AA-2008.0048 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2008-0233.html Comment: This advisory references vulnerabilities in the Linux kernel that also affect distributions other than Red Hat. It is recommended that administrators running Linux check for an updated version of the kernel for their system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2008:0233-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0233.html Issue date: 2008-05-07 CVE Names: CVE-2007-5498 CVE-2008-0007 CVE-2008-1367 CVE-2008-1375 CVE-2008-1619 CVE-2008-1669 ===================================================================== 1. Summary: Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 5. This update has been rated as having important security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. These updated packages fix the following security issues: * the absence of a protection mechanism when attempting to access a critical section of code has been found in the Linux kernel open file descriptors control mechanism, fcntl. This could allow a local unprivileged user to simultaneously execute code, which would otherwise be protected against parallel execution. As well, a race condition when handling locks in the Linux kernel fcntl functionality, may have allowed a process belonging to a local unprivileged user to gain re-ordered access to the descriptor table. (CVE-2008-1669, Important) * a possible hypervisor panic was found in the Linux kernel. A privileged user of a fully virtualized guest could initiate a stress-test File Transfer Protocol (FTP) transfer between the guest and the hypervisor, possibly leading to hypervisor panic. (CVE-2008-1619, Important) * the absence of a protection mechanism when attempting to access a critical section of code, as well as a race condition, have been found in the Linux kernel file system event notifier, dnotify. This could allow a local unprivileged user to get inconsistent data, or to send arbitrary signals to arbitrary system processes. (CVE-2008-1375, Important) Red Hat would like to thank Nick Piggin for responsibly disclosing the following issue: * when accessing kernel memory locations, certain Linux kernel drivers registering a fault handler did not perform required range checks. A local unprivileged user could use this flaw to gain read or write access to arbitrary kernel memory, or possibly cause a kernel crash. (CVE-2008-0007, Important) * the absence of sanity-checks was found in the hypervisor block backend driver, when running 32-bit paravirtualized guests on a 64-bit host. The number of blocks to be processed per one request from guest to host, or vice-versa, was not checked for its maximum value, which could have allowed a local privileged user of the guest operating system to cause a denial of service. (CVE-2007-5498, Important) * it was discovered that the Linux kernel handled string operations in the opposite way to the GNU Compiler Collection (GCC). This could allow a local unprivileged user to cause memory corruption. (CVE-2008-1367, Low) As well, these updated packages fix the following bugs: * on IBM System z architectures, when running QIOASSIST enabled QDIO devices in an IBM z/VM environment, the output queue stalled under heavy load. This caused network performance to degrade, possibly causing network hangs and outages. * multiple buffer overflows were discovered in the neofb video driver. It was not possible for an unprivileged user to exploit these issues, and as such, they have not been handled as security issues. * when running Microsoft Windows in a HVM, a bug in vmalloc/vfree caused network performance to degrade. * on certain architectures, a bug in the libATA sata_nv driver may have caused infinite reboots, and an "ata1: CPB flags CMD err flags 0x11" error. * repeatedly hot-plugging a PCI Express card may have caused "Bad DLLP" errors. * a NULL pointer dereference in NFS, which may have caused applications to crash, has been resolved. * when attempting to kexec reboot, either manually or via a panic-triggered kdump, the Unisys ES7000/one hanged after rebooting in the new kernel, after printing the "Memory: 32839688k/33685504k available" line. Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. 4. Solution: Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/FAQ_58_10188 5. Bugs fixed (http://bugzilla.redhat.com/): 369531 - CVE-2007-5498 missing sanity check in xen block backend driver 412071 - LTC37008-QDIO based network connections hang with QIOASSIST ON 427400 - CVE-2008-1619 [xen-ia64] Dom0 panic while we run ftp test tool between HVM and Dom0. 428961 - CVE-2008-0007 kernel: insufficient range checks in fault handlers with mremap 433616 - [Xen] vmalloc/vfree on HVM Guest/IA64 does untolerate performance. 433617 - libata: sata_nv may send commands with duplicate tags [5.1.z] 437312 - CVE-2008-1367 Kernel doesn't clear DF for signal handlers 437770 - CVE-2008-1619 [xen-ia64] Dom0 panic while we run ftp test tool between HVM and Dom0. 439754 - CVE-2008-1375 kernel: race condition in dnotify (local DoS, local roothole possible) 440438 - [5.1] PCI Express hotplug driver problem (Bad DLLP) [rhel-5.1.z] 440447 - 2.6.18-53.1.12 crashes on NULL pointer dereference with NFS on the stack [rhel-5.1.z] 442922 - kexec or kdump hangs on ES7000/ONE 443433 - CVE-2008-1669 kernel: add rcu_read_lock() to fcheck() in both dnotify, locks.c and fix fcntl store/load race in locks.c 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kernel-2.6.18-53.1.19.el5.src.rpm i386: kernel-2.6.18-53.1.19.el5.i686.rpm kernel-PAE-2.6.18-53.1.19.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-PAE-devel-2.6.18-53.1.19.el5.i686.rpm kernel-debug-2.6.18-53.1.19.el5.i686.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-debug-devel-2.6.18-53.1.19.el5.i686.rpm kernel-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.i686.rpm kernel-devel-2.6.18-53.1.19.el5.i686.rpm kernel-headers-2.6.18-53.1.19.el5.i386.rpm kernel-xen-2.6.18-53.1.19.el5.i686.rpm kernel-xen-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-xen-devel-2.6.18-53.1.19.el5.i686.rpm noarch: kernel-doc-2.6.18-53.1.19.el5.noarch.rpm x86_64: kernel-2.6.18-53.1.19.el5.x86_64.rpm kernel-debug-2.6.18-53.1.19.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.x86_64.rpm kernel-debug-devel-2.6.18-53.1.19.el5.x86_64.rpm kernel-debuginfo-2.6.18-53.1.19.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.x86_64.rpm kernel-devel-2.6.18-53.1.19.el5.x86_64.rpm kernel-headers-2.6.18-53.1.19.el5.x86_64.rpm kernel-xen-2.6.18-53.1.19.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-53.1.19.el5.x86_64.rpm kernel-xen-devel-2.6.18-53.1.19.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kernel-2.6.18-53.1.19.el5.src.rpm i386: kernel-2.6.18-53.1.19.el5.i686.rpm kernel-PAE-2.6.18-53.1.19.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-PAE-devel-2.6.18-53.1.19.el5.i686.rpm kernel-debug-2.6.18-53.1.19.el5.i686.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-debug-devel-2.6.18-53.1.19.el5.i686.rpm kernel-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.i686.rpm kernel-devel-2.6.18-53.1.19.el5.i686.rpm kernel-headers-2.6.18-53.1.19.el5.i386.rpm kernel-xen-2.6.18-53.1.19.el5.i686.rpm kernel-xen-debuginfo-2.6.18-53.1.19.el5.i686.rpm kernel-xen-devel-2.6.18-53.1.19.el5.i686.rpm ia64: kernel-2.6.18-53.1.19.el5.ia64.rpm kernel-debug-2.6.18-53.1.19.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.ia64.rpm kernel-debug-devel-2.6.18-53.1.19.el5.ia64.rpm kernel-debuginfo-2.6.18-53.1.19.el5.ia64.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.ia64.rpm kernel-devel-2.6.18-53.1.19.el5.ia64.rpm kernel-headers-2.6.18-53.1.19.el5.ia64.rpm kernel-xen-2.6.18-53.1.19.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-53.1.19.el5.ia64.rpm kernel-xen-devel-2.6.18-53.1.19.el5.ia64.rpm noarch: kernel-doc-2.6.18-53.1.19.el5.noarch.rpm ppc: kernel-2.6.18-53.1.19.el5.ppc64.rpm kernel-debug-2.6.18-53.1.19.el5.ppc64.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.ppc64.rpm kernel-debug-devel-2.6.18-53.1.19.el5.ppc64.rpm kernel-debuginfo-2.6.18-53.1.19.el5.ppc64.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.ppc64.rpm kernel-devel-2.6.18-53.1.19.el5.ppc64.rpm kernel-headers-2.6.18-53.1.19.el5.ppc.rpm kernel-headers-2.6.18-53.1.19.el5.ppc64.rpm kernel-kdump-2.6.18-53.1.19.el5.ppc64.rpm kernel-kdump-debuginfo-2.6.18-53.1.19.el5.ppc64.rpm kernel-kdump-devel-2.6.18-53.1.19.el5.ppc64.rpm s390x: kernel-2.6.18-53.1.19.el5.s390x.rpm kernel-debug-2.6.18-53.1.19.el5.s390x.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.s390x.rpm kernel-debug-devel-2.6.18-53.1.19.el5.s390x.rpm kernel-debuginfo-2.6.18-53.1.19.el5.s390x.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.s390x.rpm kernel-devel-2.6.18-53.1.19.el5.s390x.rpm kernel-headers-2.6.18-53.1.19.el5.s390x.rpm x86_64: kernel-2.6.18-53.1.19.el5.x86_64.rpm kernel-debug-2.6.18-53.1.19.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-53.1.19.el5.x86_64.rpm kernel-debug-devel-2.6.18-53.1.19.el5.x86_64.rpm kernel-debuginfo-2.6.18-53.1.19.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-53.1.19.el5.x86_64.rpm kernel-devel-2.6.18-53.1.19.el5.x86_64.rpm kernel-headers-2.6.18-53.1.19.el5.x86_64.rpm kernel-xen-2.6.18-53.1.19.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-53.1.19.el5.x86_64.rpm kernel-xen-devel-2.6.18-53.1.19.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: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5498 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0007 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1367 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1375 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1619 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1669 http://www.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <firstname.lastname@example.org>. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBSCJIEyh9+71yA2DNAQIsswP9GggsIY/BGLDPGIFDp1MC16/Mao+w2BJG BAJ5zWcX7hkNLb34xcMVppb4J6iiEqTN2bjDOMI93SxR1Ma7TQK18OUJ2U7BrJhX n33Ujw+ZX7W9rs+gJryZN9o/qHsBg6G3D0St12DWbi/qeSZ2KvaI7Dr0DCyPuMGQ CzEWD7rtVFQ= =pCnM -----END PGP SIGNATURE-----