Ubuntu Security Notice 2339-2 - Daniel Genkin, Adi Shamir, and Eran Tromer discovered that Libgcrypt was susceptible to an adaptive chosen ciphertext attack via physical side channels. A local attacker could use this attack to possibly recover private keys.
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Ubuntu Security Notice USN-2339-2
September 03, 2014
libgcrypt11 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
Summary:
Libgcrypt could expose sensitive information when performing decryption.
Software Description:
- libgcrypt11: LGPL Crypto library
Details:
Daniel Genkin, Adi Shamir, and Eran Tromer discovered that Libgcrypt was
susceptible to an adaptive chosen ciphertext attack via physical side
channels. A local attacker could use this attack to possibly recover
private keys.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS:
libgcrypt11 1.5.3-2ubuntu4.1
Ubuntu 12.04 LTS:
libgcrypt11 1.5.0-3ubuntu0.3
Ubuntu 10.04 LTS:
libgcrypt11 1.4.4-5ubuntu2.3
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2339-2
http://www.ubuntu.com/usn/usn-2339-1
CVE-2014-5270
Package Information:
https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.1
https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.0-3ubuntu0.3
https://launchpad.net/ubuntu/+source/libgcrypt11/1.4.4-5ubuntu2.3