USN-3017-1: Linux kernel vulnerabilities

USN-3017-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3017-1

27th June, 2016

linux vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 15.10

Summary

Several security issues were fixed in the kernel.

Software description

  • linux
    – Linux kernel

Details

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling 32 bit
compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local
unprivileged attacker could use this to cause a denial of service (system
crash) or execute arbitrary code with administrative privileges.
(CVE-2016-4997)

Kangjie Lu discovered an information leak in the core USB implementation in
the Linux kernel. A local attacker could use this to obtain potentially
sensitive information from kernel memory. (CVE-2016-4482)

Kangjie Lu discovered an information leak in the timer handling
implementation in the Advanced Linux Sound Architecture (ALSA) subsystem of
the Linux kernel. A local attacker could use this to obtain potentially
sensitive information from kernel memory. (CVE-2016-4569, CVE-2016-4578)

Kangjie Lu discovered an information leak in the X.25 Call Request handling
in the Linux kernel. A local attacker could use this to obtain potentially
sensitive information from kernel memory. (CVE-2016-4580)

It was discovered that an information leak exists in the Rock Ridge
implementation in the Linux kernel. A local attacker who is able to mount a
malicious iso9660 file system image could exploit this flaw to obtain
potentially sensitive information from kernel memory. (CVE-2016-4913)

Baozeng Ding discovered that the Transparent Inter-process Communication
(TIPC) implementation in the Linux kernel did not verify socket existence
before use in some situations. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-4951)

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling
IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to
cause a denial of service (system crash) or obtain potentially sensitive
information from kernel memory. (CVE-2016-4998)

Update instructions

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

Ubuntu 15.10:
linux-image-4.2.0-41-powerpc64-emb

4.2.0-41.48
linux-image-4.2.0-41-lowlatency

4.2.0-41.48
linux-image-4.2.0-41-generic

4.2.0-41.48
linux-image-4.2.0-41-powerpc-smp

4.2.0-41.48
linux-image-4.2.0-41-powerpc-e500mc

4.2.0-41.48
linux-image-4.2.0-41-powerpc64-smp

4.2.0-41.48
linux-image-4.2.0-41-generic-lpae

4.2.0-41.48

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

CVE-2016-4482,

CVE-2016-4569,

CVE-2016-4578,

CVE-2016-4580,

CVE-2016-4913,

CVE-2016-4951,

CVE-2016-4997,

CVE-2016-4998

Source: USN-3017-1: Linux kernel vulnerabilities

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