28 May 2014
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0831 Important: kernel-rt security update 28 May 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Root Compromise -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2014-3122 CVE-2014-2851 CVE-2014-2706 CVE-2014-2678 CVE-2014-2672 CVE-2014-1738 CVE-2014-1737 CVE-2014-0196 CVE-2014-0100 Reference: ESB-2014.0784 ESB-2014.0766 ESB-2014.0735 ESB-2014.0710 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2014-0557.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security update Advisory ID: RHSA-2014:0557-01 Product: Red Hat Enterprise MRG for RHEL-6 Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0557.html Issue date: 2014-05-27 CVE Names: CVE-2014-0100 CVE-2014-0196 CVE-2014-1737 CVE-2014-1738 CVE-2014-2672 CVE-2014-2678 CVE-2014-2706 CVE-2014-2851 CVE-2014-3122 ===================================================================== 1. Summary: Updated kernel-rt packages that fix multiple security issues are now available for Red Hat Enterprise MRG 2.5. 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: 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. * A race condition leading to a use-after-free flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled the addition of fragments to the LRU (Last-Recently Used) list under certain conditions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system by sending a large amount of specially crafted fragmented packets to that system. (CVE-2014-0100, Important) * A race condition flaw, leading to heap-based buffer overflows, was found in the way the Linux kernel's N_TTY line discipline (LDISC) implementation handled concurrent processing of echo output and TTY write operations originating from user space when the underlying TTY driver was PTY. An unprivileged, local user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-0196, Important) * A flaw was found in the way the Linux kernel's floppy driver handled user space provided data in certain error code paths while processing FDRAWCMD IOCTL commands. A local user with write access to /dev/fdX could use this flaw to free (using the kfree() function) arbitrary kernel memory. (CVE-2014-1737, Important) * It was found that the Linux kernel's floppy driver leaked internal kernel memory addresses to user space during the processing of the FDRAWCMD IOCTL command. A local user with write access to /dev/fdX could use this flaw to obtain information about the kernel heap arrangement. (CVE-2014-1738, Low) Note: A local user with write access to /dev/fdX could use these two flaws (CVE-2014-1737 in combination with CVE-2014-1738) to escalate their privileges on the system. * A use-after-free flaw was found in the way the ping_init_sock() function of the Linux kernel handled the group_info reference counter. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-2851, Important) * It was found that a remote attacker could use a race condition flaw in the ath_tx_aggr_sleep() function to crash the system by creating large network traffic on the system's Atheros 9k wireless network adapter. (CVE-2014-2672, Moderate) * A NULL pointer dereference flaw was found in the rds_iw_laddr_check() function in the Linux kernel's implementation of Reliable Datagram Sockets (RDS). A local, unprivileged user could use this flaw to crash the system. (CVE-2014-2678, Moderate) * A race condition flaw was found in the way the Linux kernel's mac80211 subsystem implementation handled synchronization between TX and STA wake-up code paths. A remote attacker could use this flaw to crash the system. (CVE-2014-2706, Moderate) * It was found that the try_to_unmap_cluster() function in the Linux kernel's Memory Managment subsystem did not properly handle page locking in certain cases, which could potentially trigger the BUG_ON() macro in the mlock_vma_page() function. A local, unprivileged user could use this flaw to crash the system. (CVE-2014-3122, Moderate) Red Hat would like to thank Matthew Daley for reporting CVE-2014-1737 and CVE-2014-1738. The CVE-2014-0100 issue was discovered by Nikolay Aleksandrov of Red Hat. Users are advised to upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.10.33-rt32.34 and 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/site/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. 5. Bugs fixed (https://bugzilla.redhat.com/): 1070618 - CVE-2014-0100 kernel: net: inet frag code race condition leading to user-after-free 1083246 - CVE-2014-2672 kernel: ath9k: tid->sched race in ath_tx_aggr_sleep() 1083274 - CVE-2014-2678 kernel: net: rds: dereference of a NULL device in rds_iw_laddr_check() 1083512 - CVE-2014-2706 Kernel: net: mac80211: crash dues to AP powersave TX vs. wakeup race 1086730 - CVE-2014-2851 kernel: net: ping: refcount issue in ping_init_sock() function 1093076 - CVE-2014-3122 Kernel: mm: try_to_unmap_cluster() should lock_page() before mlocking 1094232 - CVE-2014-0196 kernel: pty layer race condition leading to memory corruption 1094299 - CVE-2014-1737 CVE-2014-1738 kernel: block: floppy: privilege escalation via FDRAWCMD floppy ioctl command 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-3.10.33-rt32.34.el6rt.src.rpm noarch: kernel-rt-doc-3.10.33-rt32.34.el6rt.noarch.rpm kernel-rt-firmware-3.10.33-rt32.34.el6rt.noarch.rpm x86_64: kernel-rt-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-debug-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-debug-debuginfo-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-debug-devel-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-debuginfo-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-devel-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-trace-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-trace-debuginfo-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-trace-devel-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-vanilla-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-vanilla-debuginfo-3.10.33-rt32.34.el6rt.x86_64.rpm kernel-rt-vanilla-devel-3.10.33-rt32.34.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-2014-0100.html https://www.redhat.com/security/data/cve/CVE-2014-0196.html https://www.redhat.com/security/data/cve/CVE-2014-1737.html https://www.redhat.com/security/data/cve/CVE-2014-1738.html https://www.redhat.com/security/data/cve/CVE-2014-2672.html https://www.redhat.com/security/data/cve/CVE-2014-2678.html https://www.redhat.com/security/data/cve/CVE-2014-2706.html https://www.redhat.com/security/data/cve/CVE-2014-2851.html https://www.redhat.com/security/data/cve/CVE-2014-3122.html https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <firstname.lastname@example.org>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2014 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFThL2GXlSAg2UNWIIRAnKNAKC8L7AEZsVfN3SDIRby/ZWJeNGsfACePcvG f8gO1I7yuxLQ1jWWp5abYcQ= =WQJC - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU4Vl7RLndAQH1ShLAQJYGRAAlffJm1eTK2mo/Yi/vfRSc6TBmXB0lxNS Pcqw8tqnIEprrQMkGJlRgDozzzdfzFWiICdJHRrQee5yeMPC+tllHZuGLTkaOV3r Q/4xtaZazMWVZqOek/oC+CgrBthUP7WeRJiVSlg3o4926gxFd7epJTJh9QpCcsVO wKieepxfY3OVOjs16cypiXdXmdUb07CcO9HANkSdDJ7qE51Cn0oBdI8mW16Cgnhq Ki1VNns7HccH2KV9cHHYlRSHQSxCwDMcb/kBde0ZeTpiRTk9NyDGQW3nakiNFc3K p6K/LmOpS0lfF3ITJfVdtGO/YlJTy3OA8uRp2XGwBhuHqD8jY6CzO2Oo28fdpbTi M2EiqiiAepp9p5hn+0ImkE/tPYOnoCGq93iberr0GRQW52+ApiTH4urJ8iPkfTSC l5FOKG2c5Q+ViUxwBNEHCxWza89HybQJn40NKoaMXlrJ980luHmqoh0YMgHU5/Vs SeudVsKYn0oBhiKItbB+xStQaHSUyCuzmU+5hpVocWVSriBct0FIIIDWTA8VDU3p 9yjr02kOb+8Vkc3VPMixBT2ESvUilSw+o/1gWM8yhNCfWGF3rbQpMb/1UDyrY7y3 dl/a4AATAPyA5ctIDrMFCS7hCphupWCfzJTyKx+BOzLv/JRHNCfLZoInu8swgcO2 7jtaZkyWIj8= =/cb5 -----END PGP SIGNATURE-----