USN-1424-1: OpenSSL vulnerabilities

Ubuntu Security Notice USN-1424-1

19th April, 2012

openssl vulnerabilities

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

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

Summary

An application using OpenSSL could be made to crash or run programs if it opened a specially crafted file.

Software description

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

Details

It was discovered that OpenSSL could be made to dereference a NULL pointer
when processing S/MIME messages. A remote attacker could use this to cause
a denial of service. These issues did not affect Ubuntu 8.04 LTS.
(CVE-2006-7250, CVE-2012-1165)

Tavis Ormandy discovered that OpenSSL did not properly perform bounds
checking when processing DER data via BIO or FILE functions. A remote
attacker could trigger this flaw in services that used SSL to cause a
denial of service or possibly execute arbitrary code with application
privileges. (CVE-2012-2110)

Update instructions

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

Ubuntu 11.10:
libssl1.0.0 1.0.0e-2ubuntu4.4
Ubuntu 11.04:
libssl0.9.8 0.9.8o-5ubuntu1.4
Ubuntu 10.04 LTS:
libssl0.9.8 0.9.8k-7ubuntu8.10
Ubuntu 8.04 LTS:
libssl0.9.8 0.9.8g-4ubuntu3.17

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

CVE-2006-7250, CVE-2012-1165, CVE-2012-2110