ID

VAR-201205-0016

CVE

CVE-2011-3188

TITLE

Linux Kernel Authorization problem vulnerability

DESCRIPTION

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to generate sequence numbers and Fragment Identification values, which makes it easier for remote attackers to cause a denial of service (disrupted networking) or hijack network sessions by predicting these values and sending crafted packets. The Linux kernel is prone to a security weakness related to TCP sequence number generation. Attackers can exploit this issue to inject arbitrary packets into TCP sessions using brute force attack, to perform unauthorized actions. Attackers can cause a denial-of-service condition by injecting a SYN or RST packet into the TCP session, which terminates the established connection. Other attacks such as man-in-the-middle attacks are also possible. The NFSv4 implementation is one of the distributed file system protocols. CVE-2011-2517 It was discovered that the netlink-based wireless configuration interface performed insufficient length validation when parsing SSIDs, resulting in buffer overflows. CVE-2011-2700 Mauro Carvalho Chehab of Red Hat reported a buffer overflow issue in the driver for the Si4713 FM Radio Transmitter driver used by N900 devices. CVE-2011-2905 Christian Ohm discovered that the 'perf' analysis tool searches for its config files in the current working directory. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2009-4067 Rafael Dominguez Vega of MWR InfoSecurity reported an issue in the auerswald module, a driver for Auerswald PBX/System Telephone USB devices. Attackers with physical access to a system's USB ports could obtain elevated privileges using a specially crafted USB device. CVE-2011-0712 Rafael Dominguez Vega of MWR InfoSecurity reported an issue in the caiaq module, a USB driver for Native Instruments USB audio devices. Attackers with physical access to a system's USB ports could obtain elevated privileges using a specially crafted USB device. CVE-2011-1020 Kees Cook discovered an issue in the /proc filesystem that allows local users to gain access to sensitive process information after execution of a setuid binary. CVE-2011-2209 Dan Rosenberg discovered an issue in the osf_sysinfo() system call on the alpha architecture. Local users could obtain access to sensitive kernel memory. CVE-2011-2211 Dan Rosenberg discovered an issue in the osf_wait4() system call on the alpha architecture permitting local users to gain elevated privileges. CVE-2011-2213 Dan Rosenberg discovered an issue in the INET socket monitoring interface. CVE-2011-2484 Vasiliy Kulikov of Openwall discovered that the number of exit handlers that a process can register is not capped, resulting in local denial of service through resource exhaustion (cpu time and memory). CVE-2011-2491 Vasily Averin discovered an issue with the NFS locking implementation. A malicious NFS server can cause a client to hang indefinitely in an unlock call. CVE-2011-2492 Marek Kroemeke and Filip Palian discovered that uninitialized struct elements in the Bluetooth subsystem could lead to a leak of sensitive kernel memory through leaked stack memory. CVE-2011-2495 Vasiliy Kulikov of Openwall discovered that the io file of a process' proc directory was world-readable, resulting in local information disclosure of information such as password lengths. CVE-2011-2497 Dan Rosenberg discovered an integer underflow in the Bluetooth subsystem, which could lead to denial of service or privilege escalation. CVE-2011-2525 Ben Pfaff reported an issue in the network scheduling code. CVE-2011-2928 Timo Warns discovered that insufficient validation of Be filesystem images could lead to local denial of service if a malformed filesystem image is mounted. This can be used by remote attackers to inject packets into an active session. CVE-2011-3191 Darren Lavender reported an issue in the Common Internet File System (CIFS). This update also includes a fix for a regression introduced with the previous security fix for CVE-2011-1768 (Debian: #633738) For the oldstable distribution (lenny), this problem has been fixed in version 2.6.26-26lenny4. Updates for arm and alpha are not yet available, but will be released as soon as possible. Updates for the hppa and ia64 architectures will be included in the upcoming 5.0.9 point release. The following matrix lists additional source packages that were rebuilt for compatibility with or to take advantage of this update: Debian 5.0 (lenny) user-mode-linux 2.6.26-1um-2+26lenny4 We recommend that you upgrade your linux-2.6 and user-mode-linux packages. However, given the high frequency at which low-severity security issues are discovered in the kernel and the resource requirements of doing an update, updates for lower priority issues will normally not be released for all kernels at the same time. Rather, they will be released in a staggered or "leap-frog" fashion. 5.6.z server) - i386, ia64, noarch, ppc, s390x, x86_64 3. (CVE-2011-3188, Moderate) * A flaw was found in the Linux kernel's clock implementation on 32-bit, SMP (symmetric multiprocessing) systems. In addition, this update fixes the following bugs: * When the Global File System 2 (GFS2) file system is suspended, its delete work queue is also suspended, along with any pending work on the queue. Prior to this update, if GFS2's transaction lock was demoted while the delete work queue was suspended, a deadlock could occur on the file system because the file system tried to flush the work queue in the lock demotion code. With this update, the delete work queue is no longer flushed by the lock demotion code, and a deadlock no longer occurs. Instead, the work queue is flushed by the unmount operation, so that pending work is properly completed. (BZ#733678) * A previously applied patch introduced a regression for third-party file systems that do not set the FS_HAS_IODONE2 flag, specifically, Oracle Cluster File System 2 (OCFS2). The patch removed a call to the aio_complete function, resulting in no completion events being processed, causing user-space applications to become unresponsive. This update reintroduces the aio_complete function call, fixing this issue. (BZ#734156) * Certain devices support multiple operation modes. For example, EMC CLARiiON disk arrays support ALUA mode and their own vendor specific mode for failover. In Red Hat Enterprise Linux 5.5, a bug was discovered that prevented tools such as multipath from being able to select the device/hardware handler plug-in to use. This resulted in the application (for example, multipath) not working properly. With this update, the kernel has been modified to allow applications to select the device/hardware handler to use, thus resolving this issue. (BZ#739900) * This update improves the performance of delete/unlink operations in a GFS2 file system with large files by adding a layer of metadata read-ahead for indirect blocks. Bugs fixed (http://bugzilla.redhat.com/): 732658 - CVE-2011-3188 kernel: net: improve sequence number generation 732878 - CVE-2011-3209 kernel: panic occurs when clock_gettime() is called 733678 - GFS2: recovery stuck on transaction lock [rhel-5.6.z] 739900 - scsi_dh_emc gives "error attaching hardware handler" for EMC active-active SANs [rhel-5.6.z] 6. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2012:0010-01 Product: Red Hat Enterprise MRG for RHEL-6 Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0010.html Issue date: 2012-01-10 CVE Names: CVE-2011-1162 CVE-2011-2494 CVE-2011-2723 CVE-2011-2898 CVE-2011-3188 CVE-2011-3191 CVE-2011-3353 CVE-2011-3359 CVE-2011-3363 CVE-2011-3637 CVE-2011-4081 CVE-2011-4110 CVE-2011-4132 CVE-2011-4326 ===================================================================== 1. Summary: Updated kernel-rt packages that fix several security issues and two bugs are now available for Red Hat Enterprise MRG 2.0. 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: MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64 3. Description: The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues: * A malicious CIFS (Common Internet File System) server could send a specially-crafted response to a directory read request that would result in a denial of service or privilege escalation on a system that has a CIFS share mounted. (CVE-2011-3191, Important) * The way fragmented IPv6 UDP datagrams over the bridge with UDP Fragmentation Offload (UFO) functionality on were handled could allow a remote attacker to cause a denial of service. (CVE-2011-4326, Important) * GRO (Generic Receive Offload) fields could be left in an inconsistent state. An attacker on the local network could use this flaw to cause a denial of service. GRO is enabled by default in all network drivers that support it. (CVE-2011-2723, Moderate) * IPv4 and IPv6 protocol sequence number and fragment ID generation could allow a man-in-the-middle attacker to inject packets and possibly hijack connections. Protocol sequence numbers and fragment IDs are now more random. (CVE-2011-3188, Moderate) * A flaw in the FUSE (Filesystem in Userspace) implementation could allow a local user in the fuse group who has access to mount a FUSE file system to cause a denial of service. (CVE-2011-3353, Moderate) * A flaw in the b43 driver. If a system had an active wireless interface that uses the b43 driver, an attacker able to send a specially-crafted frame to that interface could cause a denial of service. (CVE-2011-3359, Moderate) * A flaw in the way CIFS shares with DFS referrals at their root were handled could allow an attacker on the local network, who is able to deploy a malicious CIFS server, to create a CIFS network share that, when mounted, would cause the client system to crash. (CVE-2011-3363, Moderate) * A flaw in the m_stop() implementation could allow a local, unprivileged user to trigger a denial of service. (CVE-2011-3637, Moderate) * Flaws in ghash_update() and ghash_final() could allow a local, unprivileged user to cause a denial of service. (CVE-2011-4081, Moderate) * A flaw in the key management facility could allow a local, unprivileged user to cause a denial of service via the keyctl utility. (CVE-2011-4110, Moderate) * A flaw in the Journaling Block Device (JBD) could allow a local attacker to crash the system by mounting a specially-crafted ext3 or ext4 disk. (CVE-2011-4132, Moderate) * A flaw in the way memory containing security-related data was handled in tpm_read() could allow a local, unprivileged user to read the results of a previously run TPM command. (CVE-2011-1162, Low) * I/O statistics from the taskstats subsystem could be read without any restrictions, which could allow a local, unprivileged user to gather confidential information, such as the length of a password used in a process. (CVE-2011-2494, Low) * Flaws in tpacket_rcv() and packet_recvmsg() could allow a local, unprivileged user to leak information to user-space. (CVE-2011-2898, Low) Red Hat would like to thank Darren Lavender for reporting CVE-2011-3191; Brent Meshier for reporting CVE-2011-2723; Dan Kaminsky for reporting CVE-2011-3188; Yogesh Sharma for reporting CVE-2011-3363; Nick Bowler for reporting CVE-2011-4081; Peter Huewe for reporting CVE-2011-1162; and Vasiliy Kulikov of Openwall for reporting CVE-2011-2494. This update also fixes the following bugs: * Previously, a mismatch in the build-id of the kernel-rt and the one in the related debuginfo package caused failures in SystemTap and perf. (BZ#768413) * IBM x3650m3 systems were not able to boot the MRG Realtime kernel because they require a pmcraid driver that was not available. The pmcraid driver is included in this update. (BZ#753992) Users should upgrade to these updated packages, which 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 https://access.redhat.com/kb/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/): 716842 - CVE-2011-2494 kernel: taskstats io infoleak 726552 - CVE-2011-2723 kernel: gro: only reset frag0 when skb can be pulled 728023 - CVE-2011-2898 kernel: af_packet: infoleak 732629 - CVE-2011-1162 kernel: tpm: infoleak 732658 - CVE-2011-3188 kernel: net: improve sequence number generation 732869 - CVE-2011-3191 kernel: cifs: signedness issue in CIFSFindNext() 736761 - CVE-2011-3353 kernel: fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message 738202 - CVE-2011-3359 kernel: b43: allocate receive buffers big enough for max frame len + offset 738291 - CVE-2011-3363 kernel: cifs: always do is_path_accessible check in cifs_mount 747848 - CVE-2011-3637 kernel: proc: fix oops on invalid /proc/<pid>/maps access 749475 - CVE-2011-4081 kernel: crypto: ghash: null pointer deref if no key is set 751297 - CVE-2011-4110 kernel: keys: NULL pointer deref in the user-defined key type 753341 - CVE-2011-4132 kernel: jbd/jbd2: invalid value of first log block leads to oops 755584 - CVE-2011-4326 kernel: wrong headroom check in udp6_ufo_fragment() 6. Package List: MRG Realtime for RHEL 6 Server v.2: Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/kernel-rt-2.6.33.9-rt31.79.el6rt.src.rpm noarch: kernel-rt-doc-2.6.33.9-rt31.79.el6rt.noarch.rpm kernel-rt-firmware-2.6.33.9-rt31.79.el6rt.noarch.rpm x86_64: kernel-rt-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-debug-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-debug-debuginfo-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-debug-devel-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-debuginfo-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-debuginfo-common-x86_64-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-devel-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-trace-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-trace-debuginfo-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-trace-devel-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-vanilla-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-vanilla-debuginfo-2.6.33.9-rt31.79.el6rt.x86_64.rpm kernel-rt-vanilla-devel-2.6.33.9-rt31.79.el6rt.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://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-1162.html https://www.redhat.com/security/data/cve/CVE-2011-2494.html https://www.redhat.com/security/data/cve/CVE-2011-2723.html https://www.redhat.com/security/data/cve/CVE-2011-2898.html https://www.redhat.com/security/data/cve/CVE-2011-3188.html https://www.redhat.com/security/data/cve/CVE-2011-3191.html https://www.redhat.com/security/data/cve/CVE-2011-3353.html https://www.redhat.com/security/data/cve/CVE-2011-3359.html https://www.redhat.com/security/data/cve/CVE-2011-3363.html https://www.redhat.com/security/data/cve/CVE-2011-3637.html https://www.redhat.com/security/data/cve/CVE-2011-4081.html https://www.redhat.com/security/data/cve/CVE-2011-4110.html https://www.redhat.com/security/data/cve/CVE-2011-4132.html https://www.redhat.com/security/data/cve/CVE-2011-4326.html https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2012 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFPDJ6FXlSAg2UNWIIRAsrYAKCLerKtJ4QtRBX9XbrUMn6hOusSYACcDy1x DrRqrqyb3B96r051baGDAZU= =M480 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Software Description: - linux-mvl-dove: Linux kernel for DOVE Details: Ryan Sweat discovered that the kernel incorrectly handled certain VLAN packets. (CVE-2011-1833) Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2494) Vasiliy Kulikov discovered that /proc/PID/io did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2497) It was discovered that the EXT4 filesystem contained multiple off-by-one flaws. (CVE-2011-2695) Fernando Gont discovered that the IPv6 stack used predictable fragment identification numbers. (CVE-2011-2905) Time Warns discovered that long symlinks were incorrectly handled on Be filesystems. A remote attacker with a malicious server could exploit this to crash the system or possibly execute arbitrary code as the root user. (CVE-2011-3191) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 10.04 LTS: linux-image-2.6.32-219-dove 2.6.32-219.37 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well. (CVE-2011-3188) Yogesh Sharma discovered that CIFS did not correctly handle UNCs that had no prefixpaths

AFFECTED PRODUCTS