Ubuntu 6.06 LTS / 7.10 / 8.04 LTS / 8.10 : python-crypto vulnerability (USN-729-1)

Critical Nessus Plugin ID 37504


The remote Ubuntu host is missing one or more security-related patches.


Mike Wiacek discovered that the ARC2 implementation in Python Crypto did not correctly check the key length. If a user or automated system were tricked into processing a malicious ARC2 stream, a remote attacker could execute arbitrary code or crash the application using Python Crypto, leading to a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected python-crypto, python-crypto-dbg and / or python2.4-crypto packages.

Plugin Details

Severity: Critical

ID: 37504

File Name: ubuntu_USN-729-1.nasl

Version: $Revision: 1.10 $

Type: local

Agent: unix

Published: 2009/04/23

Modified: 2016/05/27

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

Temporal Score: 7.8

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python-crypto, p-cpe:/a:canonical:ubuntu_linux:python-crypto-dbg, p-cpe:/a:canonical:ubuntu_linux:python2.4-crypto, cpe:/o:canonical:ubuntu_linux:6.06:-:lts, cpe:/o:canonical:ubuntu_linux:7.10, cpe:/o:canonical:ubuntu_linux:8.04:-:lts, cpe:/o:canonical:ubuntu_linux:8.10

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2009/03/05

Reference Information

CVE: CVE-2009-0544

BID: 33674

USN: 729-1

CWE: 119