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Vulnerability of Bouncy Castle JCE: timing attack

Synthesis of the vulnerability 

An attacker can measure the computation time of Bouncy Castle JCE, in order to obtain potentially sensitive information.
Vulnerable software: Bouncy Castle JCE.
Severity of this announce: 1/4.
Creation date: 14/01/2010.
Références of this computer vulnerability: VIGILANCE-VUL-9349.

Description of the vulnerability 

The Bouncy Castle JCE library implements several modes for its encryption algorithms:
 - CCM : Counter with CBC-MAC
 - GCM : Galois Counter Mode
 - etc.

However, the computation time for CCM and GCM mode depends on data to compute.

An attacker can therefore measure the computation time of Bouncy Castle JCE, in order to obtain potentially sensitive information.
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This security weakness impacts software or systems such as Bouncy Castle JCE.

Our Vigil@nce team determined that the severity of this threat bulletin is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this threat.

Solutions for this threat 

Bouncy Castle JCE: version 1.45.
Version 1.45 is corrected:
  http://www.bouncycastle.org/
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