Debian DSA-2781-1 : python-crypto - PRNG not correctly reseeded in some situations

medium Nessus Plugin ID 70503

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Synopsis

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

Description

A cryptographic vulnerability was discovered in the pseudo random number generator in python-crypto.

In some situations, a race condition could prevent the reseeding of the generator when multiple processes are forked from the same parent.
This would lead it to generate identical output on all processes, which might leak sensitive values like cryptographic keys.

Solution

Upgrade the python-crypto packages.

For the oldstable distribution (squeeze), this problem has been fixed in version 2.1.0-2+squeeze2.

For the stable distribution (wheezy), this problem has been fixed in version 2.6-4+deb7u3.

Plugin Details

Severity: Medium

ID: 70503

File Name: debian_DSA-2781.nasl

Version: 1.8

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/20/2013

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python-crypto, cpe:/o:debian:debian_linux:6.0, 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: 10/18/2013

Reference Information

CVE: CVE-2013-1445

BID: 63201

DSA: 2781

Detections

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