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Ubuntu 12.04 LTS OpenSSL USN-1732-3 Critical Denial Of Service Fix

ubuntu
Calendar Grey March 25, 2013
Scroller Ubuntu
Numerous vulnerabilities in OpenSSL have been patched in Ubuntu 12.04 LTS and 12.10, mitigating severe exploitation risks and system failures.
Several security issues were fixed in OpenSSL.

Summary

Several security issues were fixed in OpenSSL.

Software Description:

- openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

USN-1732-1 fixed vulnerabilities in OpenSSL. The fix for CVE-2013-0169 and

CVE-2012-2686 was reverted in USN-1732-2 because of a regression. This

update restores the security fix, and includes an extra fix from upstream

to address the AES-NI regression. We apologize for the inconvenience.

Original advisory details:

Adam Langley and Wolfgang Ettlingers discovered that OpenSSL incorrectly

handled certain crafted CBC data when used with AES-NI. A remote attacker

could use this issue to cause OpenSSL to crash, resulting in a denial of

service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 12.10.

(CVE-2012-2686)

Nadhem Alfardan and Kenny Paterson discovered that the TLS protocol as

used

in OpenSSL was vulnerable to a timing side-channel attack known as the

"Lucky Thirteen" issue. A remote attacker c...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu OpenSSL timing attack

Update Instructions

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

Ubuntu 12.10:
  libssl1.0.0                     1.0.1c-3ubuntu2.3

Ubuntu 12.04 LTS:
  libssl1.0.0                     1.0.1-4ubuntu5.8

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-1732-3

https://ubuntu.com/security/notices/USN-1732-1

CVE-2013-0169

Severity
critical
Lowest
Low
Medium
High
Critical

March 25, 2013

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu OpenSSL timing attack

Package Information

https://launchpad.net/ubuntu/+source/openssl/1.0.1c-3ubuntu2.3
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.8

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