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Ubuntu 12.04 LTS USN-2886-2 Critical: Kernel Denial Of Service Issues

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Calendar Grey February 1, 2016
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Essential security patches for Ubuntu 12.04 LTS tackle various vulnerabilities, improving overall system protection.
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:

It was discovered that a use-after-free vulnerability existed in the

AF_UNIX implementation in the Linux kernel. A local attacker could use

crafted epoll_ctl calls to cause a denial of service (system crash) or

expose sensitive information. (CVE-2013-7446)

It was discovered that the KVM implementation in the Linux kernel did not

properly restore the values of the Programmable Interrupt Timer (PIT). A

user-assisted attacker in a KVM guest could cause a denial of service in

the host (system crash). (CVE-2015-7513)

郭永刚 discovered that the ppp implementation in the Linux kernel did

not ensure that certain slot numbers are valid. A local attacker with the

privilege to call ioctl() on /dev/ppp could cause a denial of service

(system crash). (CVE-2015-7799)

Sasha Levin discovered that the Reliable Datagram Sockets (RDS)

implementatio...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel Linux OMAP4

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1476-omap4    3.2.0-1476.99

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-2886-1

CVE-2013-7446, CVE-2015-7513, CVE-2015-7799, CVE-2015-7990,

CVE-2015-8374, CVE-2015-8543, CVE-2015-8550, CVE-2015-8569,

CVE-2015-8575, CVE-2015-8785

Severity
critical
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Critical

February 01, 2016

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel Linux OMAP4

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1476.99

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