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USN-2337-1: Linux kernel vulnerabilities

2 September 2014

Several security issues were fixed in the kernel.

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Releases

Packages

Details

A flaw was discovered in the Linux kernel virtual machine's (kvm)
validation of interrupt requests (irq). A guest OS user could exploit this
flaw to cause a denial of service (host OS crash). (CVE-2014-0155)

Andy Lutomirski discovered a flaw in the authorization of netlink socket
operations when a socket is passed to a process of more privilege. A local
user could exploit this flaw to bypass access restrictions by having a
privileged executable do something it was not intended to do.
(CVE-2014-0181)

An information leak was discovered in the Linux kernels
aio_read_events_ring function. A local user could exploit this flaw to
obtain potentially sensitive information from kernel memory.
(CVE-2014-0206)

A flaw was discovered in the Linux kernel's implementation of user
namespaces with respect to inode permissions. A local user could exploit
this flaw by creating a user namespace to gain administrative privileges.
(CVE-2014-4014)

An information leak was discovered in the rd_mcp backend of the iSCSI
target subsystem in the Linux kernel. A local user could exploit this flaw
to obtain sensitive information from ramdisk_mcp memory by leveraging
access to a SCSI initiator. (CVE-2014-4027)

Sasha Levin reported an issue with the Linux kernel's shared memory
subsystem when used with range notifications and hole punching. A local
user could exploit this flaw to cause a denial of service. (CVE-2014-4171)

Toralf Förster reported an error in the Linux kernels syscall auditing on
32 bit x86 platforms. A local user could exploit this flaw to cause a
denial of service (OOPS and system crash). (CVE-2014-4508)

An information leak was discovered in the control implemenation of the
Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A
local user could exploit this flaw to obtain sensitive information from
kernel memory. (CVE-2014-4652)

A use-after-free flaw was discovered in the Advanced Linux Sound
Architecture (ALSA) control implementation of the Linux kernel. A local
user could exploit this flaw to cause a denial of service (system crash).
(CVE-2014-4653)

A authorization bug was discovered with the snd_ctl_elem_add function of
the Advanced Linux Sound Architecture (ALSA) in the Linux kernel. A local
user could exploit his bug to cause a denial of service (remove kernel
controls). (CVE-2014-4654)

A flaw discovered in how the snd_ctl_elem function of the Advanced Linux
Sound Architecture (ALSA) handled a reference count. A local user could
exploit this flaw to cause a denial of service (integer overflow and limit
bypass). (CVE-2014-4655)

An integer overflow flaw was discovered in the control implementation of
the Advanced Linux Sound Architecture (ALSA). A local user could exploit
this flaw to cause a denial of service (system crash). (CVE-2014-4656)

An integer underflow flaw was discovered in the Linux kernel's handling of
the backlog value for certain SCTP packets. A remote attacker could exploit
this flaw to cause a denial of service (socket outage) via a crafted SCTP
packet. (CVE-2014-4667)

Vasily Averin discover a reference count flaw during attempts to umount in
conjunction with a symlink. A local user could exploit this flaw to cause a
denial of service (memory consumption or use after free) or possibly have
other unspecified impact. (CVE-2014-5045)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. 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.

References

Related notices

  • USN-2336-1: linux-image-3.13.0-35-generic-lpae, linux-lts-trusty, linux-image-3.13.0-35-generic
  • USN-2239-1: linux-image-3.11.0-23-generic, linux-image-3.11.0-23-generic-lpae, linux-lts-saucy
  • USN-2241-1: linux-image-3.11.0-23-generic, linux-image-3.11.0-23-generic-lpae, linux
  • USN-2285-1: linux-image-3.5.0-54-generic, linux-lts-quantal
  • USN-2287-1: linux-image-3.11.0-26-generic, linux-image-3.11.0-26-generic-lpae, linux-lts-saucy
  • USN-2286-1: linux-lts-raring, linux-image-3.8.0-44-generic
  • USN-2289-1: linux-image-3.11.0-26-generic, linux-image-3.11.0-26-generic-lpae, linux
  • USN-2335-1: linux-image-3.2.0-1452-omap4, linux-ti-omap4
  • USN-2334-1: linux-image-3.2.0-68-generic, linux, linux-image-3.2.0-68-virtual, linux-image-3.2.0-68-powerpc-smp, linux-image-3.2.0-68-powerpc64-smp, linux-image-3.2.0-68-generic-pae, linux-image-3.2.0-68-highbank, linux-image-3.2.0-68-omap
  • USN-2332-1: linux-image-2.6.32-65-lpia, linux-image-2.6.32-65-preempt, linux-image-2.6.32-65-ia64, linux-image-2.6.32-65-powerpc, linux, linux-image-2.6.32-65-generic-pae, linux-image-2.6.32-65-powerpc64-smp, linux-image-2.6.32-65-sparc64-smp, linux-image-2.6.32-65-server, linux-image-2.6.32-65-virtual, linux-image-2.6.32-65-versatile, linux-image-2.6.32-65-sparc64, linux-image-2.6.32-65-powerpc-smp, linux-image-2.6.32-65-386, linux-image-2.6.32-65-generic
  • USN-2333-1: linux-ec2, linux-image-2.6.32-369-ec2

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Further reading