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Ubuntu 12.04 LTS: USN-3050-1 Critical Denial Of Service Risks

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Calendar Grey August 10, 2016
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Ubuntu 12.04 LTS experienced critical kernel vulnerabilities prompting USN-3050-1 release, addressing issues leading to instability, memory corruption, and security risks
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-ti-omap4: Linux kernel for OMAP4

Details:

Ben Hawkes 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 possibly execute arbitrary code with administrative

privileges. (CVE-2016-3134)

Vitaly Kuznetsov discovered that the Linux kernel did not properly suppress

hugetlbfs support in X86 paravirtualized guests. An attacker in the guest

OS could cause a denial of service (guest system crash). (CVE-2016-3961)

It was discovered that the keyring implementation in the Linux kernel did

not ensure a data structure was initialized before referencing it after an

error condition occurred. A local attacker could use this to cause a denial

of service (system crash). (CVE-2016-4470)

Kangjie Lu discovered an information leak ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1485-omap4    3.2.0-1485.112

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

https://ubuntu.com/security/notices/USN-3050-1

CVE-2016-3134, CVE-2016-3961, CVE-2016-4470, CVE-2016-5243

Severity
critical
Lowest
Low
Medium
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Critical

August 10, 2016

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1485.112

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