USN-1516-1: OpenSSL vulnerability

Ubuntu Security Notice USN-1516-1

25th July, 2012

openssl vulnerability

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

  • Ubuntu 12.04 LTS


OpenSSL incorrectly disabled TLS 1.1 and TLS 1.2 in certain applications.

Software description

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


It was discovered that OpenSSL incorrectly handled the SSL_OP_ALL setting.
This resulted in TLS 1.1 and TLS 1.2 being inadvertently disabled for
certain server and client applications.

Update instructions

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

Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.3

To update your system, please follow these instructions:

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


LP: 1018998