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Ubuntu 12.10 USN-1732-2 Moderate: OpenSSL Regression Causes Crashes

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Calendar Grey February 28, 2013
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A regression in OpenSSL has been identified in Ubuntu versions 12.04 LTS and 12.10, which is leading to issues with decryption processes. An update is now available to fix these problems.
USN-1732-1 introduced a regression in OpenSSL.

Summary

USN-1732-1 introduced a regression 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-2013-0166 and

CVE-2012-2686 introduced a regression causing decryption failures on

hardware supporting AES-NI. This update temporarily reverts the security

fix pending further investigation. 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 cou...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service ubuntu openssl regression

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-3ubuntu2.2
  openssl                         1.0.1c-3ubuntu2.2

Ubuntu 12.04 LTS:
  libssl1.0.0                     1.0.1-4ubuntu5.7
  openssl                         1.0.1-4ubuntu5.7

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

References

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

https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1133333

February 28, 2013

Topics%20covered

Topics Covered

security advisory denial of service ubuntu openssl regression

Package Information

https://launchpad.net/ubuntu/+source/openssl/1.0.1c-3ubuntu2.2
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.7

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