RHSA-2014:1971 - Security Advisory

Topic

Updated kernel packages that fix multiple security issues and several bugs
are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security 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.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Description

• A flaw was found in the way the Linux kernel's SCTP implementation

handled malformed or duplicate Address Configuration Change Chunks
(ASCONF). A remote attacker could use either of these flaws to crash the
system. (CVE-2014-3673, CVE-2014-3687, Important)

• A flaw was found in the way the Linux kernel's SCTP implementation

handled the association's output queue. A remote attacker could send
specially crafted packets that would cause the system to use an excessive
amount of memory, leading to a denial of service. (CVE-2014-3688,
Important)

• Two flaws were found in the way the Apple Magic Mouse/Trackpad

multi-touch driver and the Minibox PicoLCD driver handled invalid HID
reports. An attacker with physical access to the system could use these
flaws to crash the system or, potentially, escalate their privileges on the
system. (CVE-2014-3181, CVE-2014-3186, Moderate)

• A memory corruption flaw was found in the way the USB ConnectTech

WhiteHEAT serial driver processed completion commands sent via USB Request
Blocks buffers. An attacker with physical access to the system could use
this flaw to crash the system or, potentially, escalate their privileges on
the system. (CVE-2014-3185, Moderate)

• A flaw was found in the way the Linux kernel's keys subsystem handled the

termination condition in the associative array garbage collection
functionality. A local, unprivileged user could use this flaw to crash the
system. (CVE-2014-3631, Moderate)

• Multiple flaws were found in the way the Linux kernel's ALSA

implementation handled user controls. A local, privileged user could use
either of these flaws to crash the system. (CVE-2014-4654, CVE-2014-4655,
CVE-2014-4656, Moderate)

• A flaw was found in the way the Linux kernel's VFS subsystem handled

reference counting when performing unmount operations on symbolic links.
A local, unprivileged user could use this flaw to exhaust all available
memory on the system or, potentially, trigger a use-after-free error,
resulting in a system crash or privilege escalation. (CVE-2014-5045,
Moderate)

• A flaw was found in the way the get_dumpable() function return value was

interpreted in the ptrace subsystem of the Linux kernel. When
'fs.suid_dumpable' was set to 2, a local, unprivileged local user could
use this flaw to bypass intended ptrace restrictions and obtain
potentially sensitive information. (CVE-2013-2929, Low)

• A stack overflow flaw caused by infinite recursion was found in the way

the Linux kernel's UDF file system implementation processed indirect ICBs.
An attacker with physical access to the system could use a specially
crafted UDF image to crash the system. (CVE-2014-6410, Low)

• An information leak flaw in the way the Linux kernel handled media device

enumerate entities IOCTL requests could allow a local user able to access
the /dev/media0 device file to leak kernel memory bytes. (CVE-2014-1739,
Low)

• An out-of-bounds read flaw in the Logitech Unifying receiver driver could

allow an attacker with physical access to the system to crash the system
or, potentially, escalate their privileges on the system. (CVE-2014-3182,
Low)

• Multiple out-of-bounds write flaws were found in the way the Cherry

Cymotion keyboard driver, KYE/Genius device drivers, Logitech device
drivers, Monterey Genius KB29E keyboard driver, Petalynx Maxter remote
control driver, and Sunplus wireless desktop driver handled invalid HID
reports. An attacker with physical access to the system could use either of
these flaws to write data past an allocated memory buffer. (CVE-2014-3184,
Low)

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

back end driver of the iSCSI Target subsystem could allow a privileged user
to leak the contents of kernel memory to an iSCSI initiator remote client.
(CVE-2014-4027, Low)

• An information leak flaw in the Linux kernel's ALSA implementation could

allow a local, privileged user to leak kernel memory to user space.
(CVE-2014-4652, Low)

Solution

Red Hat would like to thank Frey Alfredsson for reporting CVE-2014-3631,
and Vasily Averin of Parallels for reporting CVE-2014-5045. The
CVE-2014-3673 was discovered by Liu Wei of Red Hat.

All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.

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/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.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64

Fixes

• BZ - 1028148 - CVE-2013-2929 kernel: exec/ptrace: get_dumpable() incorrect tests
• BZ - 1108744 - CVE-2014-4027 Kernel: target/rd: imformation leakage
• BZ - 1109774 - CVE-2014-1739 Kernel: drivers: media: an information leakage
• BZ - 1113406 - CVE-2014-4652 Kernel: ALSA: control: protect user controls against races & memory disclosure
• BZ - 1113445 - CVE-2014-4654 CVE-2014-4655 Kernel: ALSA: control: use-after-free in replacing user controls
• BZ - 1113470 - CVE-2014-4656 Kernel: ALSA: control: integer overflow in id.index & id.numid
• BZ - 1122472 - CVE-2014-5045 kernel: vfs: refcount issues during unmount on symlink
• BZ - 1140325 - CVE-2014-3631 kernel: keys: incorrect termination condition in assoc array garbage collection
• BZ - 1141173 - CVE-2014-3181 Kernel: HID: OOB write in magicmouse driver
• BZ - 1141210 - CVE-2014-3182 Kernel: HID: logitech-dj OOB array access
• BZ - 1141391 - CVE-2014-3184 Kernel: HID: off by one error in various _report_fixup routines
• BZ - 1141400 - CVE-2014-3185 Kernel: USB serial: memory corruption flaw
• BZ - 1141407 - CVE-2014-3186 Kernel: HID: memory corruption via OOB write
• BZ - 1141809 - CVE-2014-6410 kernel: udf: Avoid infinite loop when processing indirect ICBs
• BZ - 1147850 - CVE-2014-3673 kernel: sctp: skb_over_panic when receiving malformed ASCONF chunks
• BZ - 1155731 - CVE-2014-3687 kernel: net: sctp: fix panic on duplicate ASCONF chunks
• BZ - 1155745 - CVE-2014-3688 kernel: net: sctp: remote memory pressure from excessive queueing

CVEs

• CVE-2013-2929
• CVE-2014-4027
• CVE-2014-4655
• CVE-2014-4654
• CVE-2014-4656
• CVE-2014-4652
• CVE-2014-6410
• CVE-2014-3181
• CVE-2014-3182
• CVE-2014-3184
• CVE-2014-3185
• CVE-2014-5045
• CVE-2014-3687
• CVE-2014-3631
• CVE-2014-1739
• CVE-2014-3673
• CVE-2014-3688
• CVE-2014-3186

References

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