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Ubuntu 14.04 LTS USN-2563-1 Critical: Linux Kernel Crash Risks

ubuntu
Calendar Grey April 8, 2015
Dist Ubuntu Esm H88
Ubuntu's Linux kernel addressed multiple security vulnerabilities affecting LTS, presenting risks of system crashes and local exploit opportunities.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Sun Baoliang discovered a use after free flaw in the Linux kernel's SCTP

(Stream Control Transmission Protocol) subsystem during INIT collisions. A

remote attacker could exploit this flaw to cause a denial of service

(system crash) or potentially escalate their privileges on the system.

(CVE-2015-1421)

Marcelo Leitner discovered a flaw in the Linux kernel's routing of packets

to too many different dsts/too fast. A remote attacker can exploit this

flaw to cause a denial of service (system crash). (CVE-2015-1465)

An integer overflow was discovered in the stack randomization feature of

the Linux kernel on 64 bit platforms. A local attacker could exploit this

flaw to bypass the Address Space Layout Randomization (ASLR) mitigation

mechanism. (CVE-2015-1593)

An information leak was discovered in the Linux kernel's handling of

userspace configuration of the ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu local exploit kernel system update

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-49-generic   3.13.0-49.81
  linux-image-3.13.0-49-generic-lpae  3.13.0-49.81
  linux-image-3.13.0-49-lowlatency  3.13.0-49.81
  linux-image-3.13.0-49-powerpc-e500  3.13.0-49.81
  linux-image-3.13.0-49-powerpc-e500mc  3.13.0-49.81
  linux-image-3.13.0-49-powerpc-smp  3.13.0-49.81
  linux-image-3.13.0-49-powerpc64-emb  3.13.0-49.81
  linux-image-3.13.0-49-powerpc64-smp  3.13.0-49.81

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-2563-1

CVE-2015-1421, CVE-2015-1465, CVE-2015-1593, CVE-2015-2041,

CVE-2015-2042

Severity
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April 08, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu local exploit kernel system update

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-49.81

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