National Cyber Awareness System

Vulnerability Summary for CVE-2006-0591

Overview

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.

Description

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

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: XF

Name: cryptblowfish-salt-information-disclosure(24590)

Type: Patch Information

Hyperlink:http://xforce.iss.net/xforce/xfdb/24590

External Source: SECUNIA

Name: 18772

Type: Advisory; Patch Information

Hyperlink:http://secunia.com/advisories/18772

External Source: VUPEN

Name: ADV-2006-0477

Type: Advisory

Hyperlink:http://www.vupen.com/english/advisories/2006/0477

External Source: BUGTRAQ

Name: 20060207 crypt_blowfish 1.0

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/424260/100/0/threaded

External Source: REDHAT

Name: RHSA-2006:0526

Hyperlink:http://www.redhat.com/support/errata/RHSA-2006-0526.html

External Source: OSVDB

Name: 23005

Hyperlink:http://www.osvdb.org/23005

External Source: CONFIRM

Name: http://support.avaya.com/elmodocs2/security/ASA-2006-113.htm

Hyperlink:http://support.avaya.com/elmodocs2/security/ASA-2006-113.htm

External Source: SECUNIA

Name: 20782

Type: Advisory

Hyperlink:http://secunia.com/advisories/20782

External Source: SECUNIA

Name: 20653

Type: Advisory

Hyperlink:http://secunia.com/advisories/20653

External Source: SECUNIA

Name: 20232

Type: Advisory

Hyperlink:http://secunia.com/advisories/20232

External Source: OVAL

Name: oval:org.mitre.oval:def:11502

Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:11502

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

Hyperlink:http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/glibc/crypt_blowfish/crypt_gensalt.c?only_with_tag=CRYPT_BLOWFISH_1_0

External Source: SGI

Name: 20060602-01-U

Hyperlink:ftp://patches.sgi.com/support/free/security/advisories/20060602-01-U.asc

References to Check Content

Identifier:oval:org.mitre.oval:def:11502

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

Hyperlink:http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:11502