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Ubuntu 12.04 LTS USN-2679-1 Critical: Linux Kernel OMAP4 Denial of Service

ubuntu
Calendar Grey July 24, 2015
Scroller Ubuntu
Several security updates targeting Ubuntu's linux-ti-omap4 kernel rectify significant local privilege escalation vulnerabilities.
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:

A flaw was discovered in the user space memory copying for the pipe iovecs

in the Linux kernel. An unprivileged local user could exploit this flaw to

cause a denial of service (system crash) or potentially escalate their

privileges. (CVE-2015-1805)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter

JIT optimization. A local attacker could exploit this flaw to cause a

denial of service (system crash). (CVE-2015-4700)

Topics%20covered

Topics Covered

security advisory denial of service critical local privilege escalation ubuntu linux-ti-omap4

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1468-omap4    3.2.0-1468.89

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

https://ubuntu.com/security/notices/USN-2679-1

CVE-2015-1805, CVE-2015-4700

Severity
critical
Lowest
Low
Medium
High
Critical

July 23, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical local privilege escalation ubuntu linux-ti-omap4

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1468.89

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