The password reset functionality in Joomla! 1.5.x through 1.5.24 uses weak random numbers, which makes it easier for remote attackers to change the passwords of arbitrary users via unspecified vectors.
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Analysis
by VulDB Data Team • 01/05/2025
The vulnerability identified as CVE-2011-4321 resides within the password reset mechanism of Joomla installations. The vulnerability classifies under CWE-330 as it involves the use of weak random number generators, which creates predictable sequences that adversaries can exploit to gain unauthorized access to user accounts.
The technical implementation of the password reset functionality in these Joomla! versions fails to utilize cryptographically secure random number generation methods when creating reset tokens or temporary passwords. This weakness allows remote attackers to predict or enumerate the reset tokens used in the password recovery process, enabling them to assume the identities of arbitrary users without proper authentication. The unspecified vectors mentioned in the description suggest that the attack could potentially be executed through various means including but not limited to network sniffing, brute force attempts, or statistical analysis of the predictable token generation patterns. The vulnerability essentially undermines the core security principle of authentication by creating predictable elements in what should be secure random processes.
The operational impact of this vulnerability extends beyond simple account compromise as it enables attackers to systematically target multiple user accounts within the Joomla 1.5.x for their web presence, as the affected versions were widely deployed across various industries including government, education, and corporate sectors. The vulnerability creates a persistent threat vector that remains active until the underlying code is patched or the system is upgraded to a secure version. Attackers can leverage this weakness to conduct targeted attacks against specific users or perform broad compromise operations across entire user bases, making it a significant concern for organizations with substantial user populations.
Organizations affected by CVE-2011-4321 should immediately implement the security patches released by Joomla 1.5.25 or later versions where the cryptographic implementation has been corrected. Additionally, system administrators should consider implementing additional security measures such as account lockout mechanisms, enhanced monitoring of password reset activities, and network-based intrusion detection systems to identify potential exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and privilege escalation, specifically targeting the T1110.003 sub-technique for credential dumping and T1566 for social engineering attacks that leverage predictable authentication tokens. The vulnerability also aligns with the broader category of T1078 which covers valid accounts and T1555 which addresses credentials from password stores, as compromised accounts can be used to gain further access to systems and data within the organization's infrastructure.