Debian Security Advisory

DSA-3417-1 bouncycastle -- security update

Date Reported:
14 Dec 2015
Affected Packages:
bouncycastle
Vulnerable:
Yes
Security database references:
In the Debian bugtracking system: Bug 802671.
In Mitre's CVE dictionary: CVE-2015-7940.
More information:

Tibor Jager, Jörg Schwenk, and Juraj Somorovsky, from Horst Görtz Institute for IT Security, published a paper in ESORICS 2015 where they describe an invalid curve attack in Bouncy Castle Crypto, a Java library for cryptography. An attacker is able to recover private Elliptic Curve keys from different applications, for example, TLS servers.

More information: http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html
Practical Invalid Curve Attacks on TLS-ECDH: http://euklid.org/pdf/ECC_Invalid_Curve.pdf

For the oldstable distribution (wheezy), this problem has been fixed in version 1.44+dfsg-3.1+deb7u1.

For the stable distribution (jessie), this problem has been fixed in version 1.49+dfsg-3+deb8u1.

For the unstable distribution (sid), this problem has been fixed in version 1.51-2.

We recommend that you upgrade your bouncycastle packages.