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Last updated: 5/30/2016 7:38:25 PM

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Vulnerability Summary for CVE-2006-0591

Original release date: 02/07/2006
Last revised: 07/13/2011


The crypt_gensalt functions for BSDI-style extended DES-based and FreeBSD-sytle MD5-based password hashes in crypt_blowfish 0.4.7 and earlier do not evenly and randomly distribute salts, which makes it easier for attackers to guess passwords from a stolen password file due to the increased number of collisions.


This vulnerability may only be exploited in conjunction with another vulnerability. The password file (normally shadowed) must first be stolen.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 1.2 LOW
Impact Subscore: 2.9
Exploitability Subscore: 1.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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External Source: OVAL
Name: oval:org.mitre.oval:def:11502
External Source: VUPEN
Name: ADV-2006-0477
Type: Advisory
External Source: MISC
Name: http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/glibc/crypt_blowfish/crypt_gensalt.c?only_with_tag=CRYPT_BLOWFISH_1_0
External Source: REDHAT
Name: RHSA-2006:0526
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2006-113.htm
External Source: XF
Name: cryptblowfish-salt-information-disclosure(24590)
Type: Patch Information
External Source: BUGTRAQ
Name: 20060207 crypt_blowfish 1.0
External Source: SGI
Name: 20060602-01-U

References to Check Content

Identifier: oval:org.mitre.oval:def:11502
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

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