Ubuntu Security Notice 2863-1 - Karthikeyan Bhargavan and Gaetan Leurent discovered that OpenSSL incorrectly allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information.
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Ubuntu Security Notice USN-2863-1
January 07, 2016
openssl vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
Summary:
OpenSSL could be made to expose sensitive information over the network.
Software Description:
- openssl: Secure Socket Layer (SSL) cryptographic library and tools
Details:
Karthikeyan Bhargavan and Gaetan Leurent discovered that OpenSSL
incorrectly allowed MD5 to be used for TLS 1.2 connections. If a remote
attacker were able to perform a man-in-the-middle attack, this flaw could
be exploited to view sensitive information.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.33
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2863-1
CVE-2015-7575
Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.33