[RHSA-2014:0913-01] Important: kernel-rt security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel-rt security update

Advisory ID: RHSA-2014:0913-01

Product: Red Hat Enterprise MRG for RHEL-6

Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0913.html

Issue date: 2014-07-22

CVE Names: CVE-2014-0181 CVE-2014-0206 CVE-2014-3144

CVE-2014-3145 CVE-2014-3153 CVE-2014-3917

CVE-2014-3940 CVE-2014-4027 CVE-2014-4667

CVE-2014-4699

=====================================================================

 

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 flaw was found in the way the Linux kernel's futex subsystem handled

the requeuing of certain Priority Inheritance (PI) futexes. A local,

unprivileged user could use this flaw to escalate their privileges on the

system. (CVE-2014-3153, Important)

 

* It was found that the Linux kernel's ptrace subsystem allowed a traced

process' instruction pointer to be set to a non-canonical memory address

without forcing the non-sysret code path when returning to user space.

A local, unprivileged user could use this flaw to crash the system or,

potentially, escalate their privileges on the system. (CVE-2014-4699,

Important)

 

Note: The CVE-2014-4699 issue only affected systems using an Intel CPU.

 

* It was found that the permission checks performed by the Linux kernel

when a netlink message was received were not sufficient. A local,

unprivileged user could potentially bypass these restrictions by passing a

netlink socket as stdout or stderr to a more privileged process and

altering the output of this process. (CVE-2014-0181, Moderate)

 

* It was found that the aio_read_events_ring() function of the Linux

kernel's Asynchronous I/O (AIO) subsystem did not properly sanitize the AIO

ring head received from user space. A local, unprivileged user could use

this flaw to disclose random parts of the (physical) memory belonging to

the kernel and/or other processes. (CVE-2014-0206, Moderate)

 

* An out-of-bounds memory access flaw was found in the Netlink Attribute

extension of the Berkeley Packet Filter (BPF) interpreter functionality in

the Linux kernel's networking implementation. A local, unprivileged user

could use this flaw to crash the system or leak kernel memory to user space

via a specially crafted socket filter. (CVE-2014-3144, CVE-2014-3145,

Moderate)

 

* An out-of-bounds memory access flaw was found in the Linux kernel's

system call auditing implementation. On a system with existing audit rules

defined, a local, unprivileged user could use this flaw to leak kernel

memory to user space or, potentially, crash the system. (CVE-2014-3917,

Moderate)

 

* A flaw was found in the way Linux kernel's Transparent Huge Pages (THP)

implementation handled non-huge page migration. A local, unprivileged user

could use this flaw to crash the kernel by migrating transparent hugepages.

(CVE-2014-3940, Moderate)

 

* An integer underflow flaw was found in the way the Linux kernel's Stream

Control Transmission Protocol (SCTP) implementation processed certain

COOKIE_ECHO packets. By sending a specially crafted SCTP packet, a remote

attacker could use this flaw to prevent legitimate connections to a

particular SCTP server socket to be made. (CVE-2014-4667, Moderate)

 

* An information leak flaw was found in the RAM Disks Memory Copy (rd_mcp)

backend driver of the iSCSI Target subsystem of the Linux kernel.

A privileged user could use this flaw to leak the contents of kernel memory

to an iSCSI initiator remote client. (CVE-2014-4027, Low)

 

Red Hat would like to thank Kees Cook of Google for reporting

CVE-2014-3153, Andy Lutomirski for reporting CVE-2014-4699 and

CVE-2014-0181, and Gopal Reddy Kodudula of Nokia Siemens Networks for

reporting CVE-2014-4667. Google acknowledges Pinkie Pie as the original

reporter of CVE-2014-3153. The CVE-2014-0206 issue was discovered by

Mateusz Guzik 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-rt32.43 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/):

 

1094265 - CVE-2014-0181 kernel: net: insufficient permision checks of netlink messages

1094602 - CVE-2014-0206 kernel: aio: insufficient sanitization of head in aio_read_events_ring()

1096775 - CVE-2014-3144 CVE-2014-3145 Kernel: filter: prevent nla extensions to peek beyond the end of the message

1102571 - CVE-2014-3917 kernel: DoS with syscall auditing

1103626 - CVE-2014-3153 kernel: futex: pi futexes requeue issue

1104097 - CVE-2014-3940 Kernel: missing check during hugepage migration

1108744 - CVE-2014-4027 Kernel: target/rd: imformation leakage

1113967 - CVE-2014-4667 kernel: sctp: sk_ack_backlog wrap-around problem

1115927 - CVE-2014-4699 kernel: x86_64: ptrace: sysret to non-canonical address

 

6. Package List:

 

MRG Realtime for RHEL 6 Server v.2:

 

Source:

kernel-rt-3.10.33-rt32.43.el6rt.src.rpm

 

noarch:

kernel-rt-doc-3.10.33-rt32.43.el6rt.noarch.rpm

kernel-rt-firmware-3.10.33-rt32.43.el6rt.noarch.rpm

 

x86_64:

kernel-rt-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-debug-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-debug-debuginfo-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-debug-devel-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-debuginfo-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-debuginfo-common-x86_64-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-devel-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-trace-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-trace-debuginfo-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-trace-devel-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-vanilla-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-vanilla-debuginfo-3.10.33-rt32.43.el6rt.x86_64.rpm

kernel-rt-vanilla-devel-3.10.33-rt32.43.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-2014-0181.html

https://www.redhat.com/security/data/cve/CVE-2014-0206.html

https://www.redhat.com/security/data/cve/CVE-2014-3144.html

https://www.redhat.com/security/data/cve/CVE-2014-3145.html

https://www.redhat.com/security/data/cve/CVE-2014-3153.html

https://www.redhat.com/security/data/cve/CVE-2014-3917.html

https://www.redhat.com/security/data/cve/CVE-2014-3940.html

https://www.redhat.com/security/data/cve/CVE-2014-4027.html

https://www.redhat.com/security/data/cve/CVE-2014-4667.html

https://www.redhat.com/security/data/cve/CVE-2014-4699.html

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2014 Red Hat, Inc.

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