==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2008:0585-01 Product: Red Hat Enterprise MRG for RHEL-5 Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0585.html Issue date: 2008-08-26 CVE Names: CVE-2007-5966 CVE-2007-6282 CVE-2007-6712 CVE-2008-1615 CVE-2008-2136 CVE-2008-2148 CVE-2008-2372 CVE-2008-2729 CVE-2008-2826 ==================================================================== 1. Summary: Updated kernel packages that fix several security issues and several bugs are now available for Red Hat Enterprise MRG 1.0. This update has been rated as having important security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: MRG Realtime for RHEL 5 Server - i386, noarch, 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 possibility of a timeout value overflow was found in the Linux kernel high-resolution timers functionality, hrtimer. This could allow a local unprivileged user to execute arbitrary code, or cause a denial of service (kernel panic). (CVE-2007-5966, Important) * the possibility of a kernel crash was found in the Linux kernel IPsec protocol implementation, due to improper handling of fragmented ESP packets. When an attacker controlling an intermediate router fragmented these packets into very small pieces, it would cause a kernel crash on the receiving node during packet reassembly. (CVE-2007-6282, Important) * on 64-bit architectures, the possibility of a timer-expiration value overflow was found in the Linux kernel high-resolution timers functionality, hrtimer. This could allow a local unprivileged user to set up a large interval value, forcing the timer expiry value to become negative, causing a denial of service (kernel hang). (CVE-2007-6712, Important) * on AMD64 architectures, the possibility of a kernel crash was discovered by testing the Linux kernel process-trace ability. This could allow a local unprivileged user to cause a denial of service (kernel crash). (CVE-2008-1615, Important) * a possible kernel memory leak was found in the Linux kernel Simple Internet Transition (SIT) INET6 implementation. This could allow a local unprivileged user to cause a denial of service. (CVE-2008-2136, Important) * a flaw was found in the Linux kernel utimensat system call. File permissions were not checked when UTIME_NOW and UTIME_OMIT combinations were used. This could allow a local unprivileged user to modify file times of arbitrary files, possibly leading to a denial of service. (CVE-2008-2148, Important) * a security flaw was found in the Linux kernel memory copy routines, when running on certain AMD64 architectures. If an unsuccessful attempt to copy kernel memory from source to destination memory locations occurred, the copy routines did not zero the content at the destination memory location. This could allow a local unprivileged user to view potentially sensitive data. (CVE-2008-2729, Important) * Gabriel Campana discovered a possible integer overflow flaw in the Linux kernel Stream Control Transmission Protocol (SCTP) implementation. This deficiency could lead to privilege escalation. (CVE-2008-2826, Important) * a deficiency was found in the Linux kernel virtual memory implementation. This could allow a local unprivileged user to make a large number of calls to the get_user_pages function, possibly causing a denial of service. (CVE-2008-2372, Low) Also, these updated packages fix the following bugs: * gdb set orig_rax to 0x00000000ffffffff, which is recognized by the upstream kernel as "-1", but not by the Red Hat Enterprise MRG kernel. * if the POSIX timer was programmed to fire immediately, the timer's signal was sometimes not delivered (timer does not fire). * rwlock caused crashes and application hangs. * running oprofile caused system panics. * threads releasing a mutex may have received an EPERM error. * booting the RT kernel with the "nmi_watchdog=2" kernel option caused a kernel panic, and an "Unable to handle kernel paging request" error. * "echo 0 > /sys/devices/system/cpu/cpu1/online" caused crashes. * a crash on a JTC machine. * added a new "FUTEX_WAIT_BITSET" system call, identical to FUTEX_WAIT, that accepts absolute time as a timeout. Red Hat Enterprise MRG 1.0 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 5. Bugs fixed (http://bugzilla.redhat.com/): 404291 - CVE-2007-6282 IPSec ESP kernel panics 429290 - provide a futex syscall command similiar to FUTEX_WAIT with takes absolute timeout 431430 - CVE-2008-1615 kernel: ptrace: Unprivileged crash on x86_64 %cs corruption 439999 - CVE-2007-6712 kernel: infinite loop in highres timers (kernel hang) 446031 - CVE-2008-2136 kernel: sit memory leak 446060 - kernel: sched_fair.c simplify sched_slice() 446397 - java testcase hangs on 22.214.171.124-52ibmrt2.3 kernel 446777 - pthread_mutex_unlock returns EPERM due to earlier EFAULT from futex lock 449676 - Turning a CPU offline causes panic 451271 - CVE-2008-2729 kernel: [x86_64] The string instruction version didn't zero the output on exception. 452478 - CVE-2008-2826 kernel: sctp: sctp_getsockopt_local_addrs_old() potential overflow 452666 - CVE-2008-2372 kernel: Reinstate ZERO_PAGE optimization in 'get_user_pages()' and fix XIP 452692 - crash with 126.96.36.199-65.el5rt 452693 - POSIX timer set to fire immediately does not fire 452974 - [FOCUS] plist_add/del crash with 188.8.131.52-65ibmrt2.4 kernel 453135 - CVE-2007-5966 Non-root can trigger cpu_idle soft lockup (tickless kernel only) 453677 - nmi_watchdog=2 crashes the RT kernel on boot up 454913 - [Realtime][Kernel] LTP test failure in sched_rr_get_interval02 testcase 455275 - CVE-2008-2148 kernel: fix permission checking in sys_utimensat 455747 - Oops when running oprofile 6. Package List: MRG Realtime for RHEL 5 Server: Source: i386: kernel-rt-184.108.40.206-74.el5rt.i686.rpm kernel-rt-debug-220.127.116.11-74.el5rt.i686.rpm kernel-rt-debug-debuginfo-18.104.22.168-74.el5rt.i686.rpm kernel-rt-debug-devel-22.214.171.124-74.el5rt.i686.rpm kernel-rt-debuginfo-126.96.36.199-74.el5rt.i686.rpm kernel-rt-debuginfo-common-188.8.131.52-74.el5rt.i686.rpm kernel-rt-devel-184.108.40.206-74.el5rt.i686.rpm kernel-rt-trace-220.127.116.11-74.el5rt.i686.rpm kernel-rt-trace-debuginfo-18.104.22.168-74.el5rt.i686.rpm kernel-rt-trace-devel-22.214.171.124-74.el5rt.i686.rpm kernel-rt-vanilla-126.96.36.199-74.el5rt.i686.rpm kernel-rt-vanilla-debuginfo-188.8.131.52-74.el5rt.i686.rpm kernel-rt-vanilla-devel-184.108.40.206-74.el5rt.i686.rpm noarch: kernel-rt-doc-220.127.116.11-74.el5rt.noarch.rpm x86_64: kernel-rt-18.104.22.168-74.el5rt.x86_64.rpm kernel-rt-debug-22.214.171.124-74.el5rt.x86_64.rpm kernel-rt-debug-debuginfo-126.96.36.199-74.el5rt.x86_64.rpm kernel-rt-debug-devel-188.8.131.52-74.el5rt.x86_64.rpm kernel-rt-debuginfo-184.108.40.206-74.el5rt.x86_64.rpm kernel-rt-debuginfo-common-220.127.116.11-74.el5rt.x86_64.rpm kernel-rt-devel-18.104.22.168-74.el5rt.x86_64.rpm kernel-rt-trace-22.214.171.124-74.el5rt.x86_64.rpm kernel-rt-trace-debuginfo-126.96.36.199-74.el5rt.x86_64.rpm kernel-rt-trace-devel-188.8.131.52-74.el5rt.x86_64.rpm kernel-rt-vanilla-184.108.40.206-74.el5rt.x86_64.rpm kernel-rt-vanilla-debuginfo-220.127.116.11-74.el5rt.x86_64.rpm kernel-rt-vanilla-devel-18.104.22.168-74.el5rt.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-2007-5966 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6282 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6712 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1615 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2136 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2148 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2372 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2729 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2826 http://www.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is
. More contact details at https://www.redhat.com/security/team/contact/ Copyright 2008 Red Hat, Inc.