USN-1451-1: OpenSSL vulnerabilities

24 May 2012

openssl vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS

Summary

Applications using OpenSSL in certain situations could be made to crash or expose sensitive information.

Software Description

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

Details

Ivan Nestlerode discovered that the Cryptographic Message Syntax (CMS) and PKCS #7 implementations in OpenSSL returned early if RSA decryption failed. This could allow an attacker to expose sensitive information via a Million Message Attack (MMA). (CVE-2012-0884)

It was discovered that an integer underflow was possible when using TLS 1.1, TLS 1.2, or DTLS with CBC encryption. This could allow a remote attacker to cause a denial of service. (CVE-2012-2333)

Update instructions

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

Ubuntu 12.04 LTS
libssl1.0.0 - 1.0.1-4ubuntu5.2
openssl - 1.0.1-4ubuntu5.2
Ubuntu 11.10
libssl1.0.0 - 1.0.0e-2ubuntu4.6
openssl - 1.0.0e-2ubuntu4.6
Ubuntu 11.04
libssl0.9.8 - 0.9.8o-5ubuntu1.7
openssl - 0.9.8o-5ubuntu1.7
Ubuntu 10.04 LTS
libssl0.9.8 - 0.9.8k-7ubuntu8.13
openssl - 0.9.8k-7ubuntu8.13
Ubuntu 8.04 LTS
libssl0.9.8 - 0.9.8g-4ubuntu3.19
openssl - 0.9.8g-4ubuntu3.19

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References