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Last updated: 5/24/2016 1:39:45 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2008-4102

Original release date: 09/18/2008
Last revised: 08/19/2009


Joomla! 1.5 before 1.5.7 initializes PHP's PRNG with a weak seed, which makes it easier for attackers to guess the pseudo-random values produced by PHP's mt_rand function, as demonstrated by guessing password reset tokens, a different vulnerability than CVE-2008-3681.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.5 HIGH
Impact Subscore: 6.4
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Provides unauthorized access, Allows partial confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: MISC
Name: http://www.suspekt.org/2008/08/17/mt_srand-and-not-so-random-numbers/
External Source: MISC
Name: http://www.sektioneins.de/advisories/SE-2008-04.txt
External Source: MLIST
Name: [oss-security] 20080916 Re: CVE request: joomla < 1.5.7
External Source: MLIST
Name: [oss-security] 20080911 CVE request: joomla < 1.5.7
External Source: CONFIRM
Name: http://developer.joomla.org/security/news/272-20080902-core-random-number-generation-flaw.html
External Source: SREASON
Name: 4271
External Source: MLIST
Name: [oss-security] 20080911 CVE request for Joomla multiple vuln.
External Source: BUGTRAQ
Name: 20080911 Advisory 04/2008: Joomla Weak Random Password Reset Token Vulnerability
External Source: XF
Name: joomla-randomnumbers-info-disclosure(45068)

Technical Details

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