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Debian Security Advisory 3417-1

Debian Security Advisory 3417-1
Posted Dec 14, 2015
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3417-1 - Tibor Jager, Jorg Schwenk, and Juraj Somorovsky, from Horst Gortz 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.

tags | advisory, java, cryptography
systems | linux, debian
advisories | CVE-2015-7940
SHA-256 | 158a825b04f0f40bb96f1d9a00a016aba3e89852c2b38ad9489af18ccb50c100

Debian Security Advisory 3417-1

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3417-1 security@debian.org
https://www.debian.org/security/ Luciano Bello
December 14, 2015 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : bouncycastle
CVE ID : CVE-2015-7940
Debian Bug : 802671

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.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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