Updated kernel-rt packages that fix multiple security issues, several bugs,and add various enhancements are now available for Red Hat Enterprise MRG2.5.The Red Hat Security Response Team has rated this update as havingImportant security impact. Common Vulnerability Scoring System (CVSS) basescores, which give detailed severity ratings, are available for eachvulnerability from the CVE links in the References section.

The kernel-rt packages contain the Linux kernel, the core of any Linuxoperating system.* A denial of service flaw was found in the way the Linux kernel’s IPv6implementation processed IPv6 router advertisement (RA) packets.An attacker able to send a large number of RA packets to a target systemcould potentially use this flaw to crash the target system. (CVE-2014-2309,Important)* A flaw was found in the way the Linux kernel’s netfilter connectiontracking implementation for Datagram Congestion Control Protocol (DCCP)packets used the skb_header_pointer() function. A remote attacker could usethis flaw to send a specially crafted DCCP packet to crash the system or,potentially, escalate their privileges on the system. (CVE-2014-2523,Important)* A flaw was found in the way the Linux kernel’s CIFS implementationhandled uncached write operations with specially crafted iovec structures.An unprivileged local user with access to a CIFS share could use this flawto crash the system, leak kernel memory, or, potentially, escalate theirprivileges on the system. (CVE-2014-0069, Moderate)* A flaw was found in the way the Linux kernel handled pending FloatingPointer Unit (FPU) exceptions during the switching of tasks. A localattacker could use this flaw to terminate arbitrary processes on thesystem, causing a denial of service, or, potentially, escalate theirprivileges on the system. Note that this flaw only affected systems usingAMD CPUs on both 32-bit and 64-bit architectures. (CVE-2014-1438, Moderate)* It was found that certain protocol handlers in the Linux kernel’snetworking implementation could set the addr_len value without initializingthe associated data structure. A local, unprivileged user could use thisflaw to leak kernel stack memory to user space using the recvmsg, recvfrom,and recvmmsg system calls. (CVE-2013-7263, CVE-2013-7265, Low)* An information leak flaw was found in the Linux kernel’s netfilterconnection tracking IRC NAT helper implementation that could allow a remoteattacker to disclose portions of kernel stack memory during IRC DCC (DirectClient-to-Client) communication over NAT. (CVE-2014-1690, Low)* A denial of service flaw was discovered in the way the Linux kernel’sSELinux implementation handled files with an empty SELinux securitycontext. A local user who has the CAP_MAC_ADMIN capability could use thisflaw to crash the system. (CVE-2014-1874, Low)Red Hat would like to thank Al Viro for reporting CVE-2014-0069.The CVE-2014-1690 issue was discovered by Daniel Borkmann of Red Hat.This update also fixes several bugs and adds multiple enhancements.Documentation for these changes will be available shortly from theTechnical Notes document linked to in the References section.Users are advised to upgrade to these updated packages, which upgrade thekernel-rt kernel to version kernel-rt-3.10.33-rt32.33, correct theseissues, and fix the bugs and add the enhancements noted in the Red HatEnterprise MRG 2 Technical Notes. The system must be rebooted for thisupdate to take effect.
Before applying this update, make sure all previously released erratarelevant to your system have been applied.This update is available via the Red Hat Network. Details on how to use theRed Hat Network to apply this update are available athttps://access.redhat.com/site/articles/11258To install kernel packages manually, use “rpm -ivh [package]”. Do not use”rpm -Uvh” as that will remove the running kernel binaries from yoursystem. You may use “rpm -e” to remove old kernels after determining thatthe new kernel functions properly on your system.Red Hat Enterprise MRG v2 for Red Hat Enterprise Linux (version 6)

    MD5: a4d8a6505a1d96fb196803b6fcc160a2SHA-256: 92eb7bc9a553f76b16f10f77e3d5c2a4d33d41a28ad886fd09a9b6ae571dc16d
    MD5: dbbcad04f4fe9b080377ea1319d7bc26SHA-256: a895e13626655318dc0b0f87ad57014869721045c1c022cf898e9d3c1e58f450
    MD5: 88a99ec17bd31711cf8502ded9964b68SHA-256: 3af360197d7294924f7d5c5da94fb0236a2c0d666cec01669a2d0a427a6135c8
    MD5: 254b6f2c2b5ed368e65866910e13dbb1SHA-256: 44126eb8a5be6e46e0a7f45db20f98532bc628dcb6fad8abe1c316b0f812a600
    MD5: 8004bf76e80abfe95a32ea2648d2a06bSHA-256: 01c1a28e8f05951d629589693e71de63dd023f705d1e412d1b0d7a7ec52f71cd
    MD5: 20e428e693c3c12d4040d99b121b54a9SHA-256: 5b6279e8c67f19afd9723e3742e18810e24c77e3a3339d263cddf819513762ff
    MD5: 12304335c38bafc3f2a186f6afed8445SHA-256: 65b8d7da919e5f0d422039b17acdaf382a767a22cb2f02da17c4a25e23358835
    MD5: b48cd4fcc094845da8204bc745312ce2SHA-256: 0b97caf332580a56d8f319bcccb159fcbaee070a1b6ec085a113887d5f99cd4a
    MD5: 18dc810efaecee2e0de5946379b8326dSHA-256: e35826cd656e5ec73d9ceafa2f150881c96c929833fae90c8dd161ccbd61bc0b
    MD5: 06170e3eca75ac18e9936b42925c5806SHA-256: 48a7d0f2cdd33f70f6e5005cfe193f51261a68d668a60fdbf1e6c33159ad5af2
    MD5: ede9d823eb503a49eaea1cd486121e53SHA-256: b67b683232995fe9040c3e54912d895d1d2124f47a329d6a41897b490f8e4648
    MD5: 3e985ae0c8e05df4e0d2d6d00ad61a82SHA-256: 87889cd358a2f81adafb2f104503662de5fad86b51d916642cf84341c876a6bf
    MD5: 7d97c86bb301c71c97a49b59e4ded227SHA-256: 302dfac08e1cb547ef5123e06a05fd00f2495f8432eaa3026f452247544b7b9c
    MD5: 407a323ccddd568c7f9c4a6b13604fb0SHA-256: 976ea008e08195114187cbbeafd395228d881245f4e953b813be1aeb0482d525
    MD5: 33e5c2770750b7955938d23641e10ca4SHA-256: e9d0bb867c3d6679ee226b0be022cc8731d0f0b787e84745c5525810305a53a0
    MD5: 61763ec5209c7c940ad15355bea01ecfSHA-256: 952ab42cbbb2b85a10ae8152279baabca09b92d025885533174853e9fe06fb07
(The unlinked packages above are only available from the Red Hat Network)
1016735 – Apply IB performance patches to 3.10 realtime kernel1032245 – RFE: rebase to a 3.10 kernel1035875 – CVE-2013-7263 CVE-2013-7265 Kernel: net: leakage of uninitialized memory to user-space via recv syscalls1052914 – CVE-2014-1438 kernel: x86: exceptions are not cleared in AMD FXSAVE workaround1058748 – CVE-2014-1690 Kernel: netfilter: nf_nat: leakage of uninitialized buffer in IRC NAT helper1058848 – Panic on unload of sit module unload and reading of /proc/<pid>/net/dev1062356 – CVE-2014-1874 Kernel: SELinux: local denial-of-service1064253 – CVE-2014-0069 kernel: cifs: incorrect handling of bogus user pointers during uncached writes1067880 – hpsa driver version regression in MRG 2.5 kernel1074471 – CVE-2014-2309 Kernel: net: IPv6: crash due to router advertisement flooding1077343 – CVE-2014-2523 kernel: netfilter: nf_conntrack_dccp: incorrect skb_header_pointer API usages

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