Debian DSA-3417-1 : bouncycastle - security update

medium Nessus Plugin ID 87359

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Synopsis

The remote Debian host is missing a security-related update.

Description

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.

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

Solution

Upgrade the bouncycastle packages.

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.

Plugin Details

Severity: Medium

ID: 87359

File Name: debian_DSA-3417.nasl

Version: 2.7

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 12/15/2015

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:bouncycastle, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2015

Reference Information

CVE: CVE-2015-7940

DSA: 3417

Detections

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