CVE-2001-1008 in Java Plug-in
Summary
by MITRE
Java Plugin 1.4 for JRE 1.3 executes signed applets even if the certificate is expired, which could allow remote attackers to conduct unauthorized activities via an applet that has been signed by an expired certificate.
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Analysis
by VulDB Data Team • 06/10/2024
The vulnerability described in CVE-2001-1008 represents a critical security flaw in the Java Plugin 1.4 component of the Java Runtime Environment version 1.3. This issue stems from the improper validation of digital certificates during the execution of signed Java applets, creating a significant attack vector that undermines the fundamental security model of Java's code signing mechanism. The vulnerability specifically affects the certificate validation process, where the system fails to properly verify certificate expiration dates before executing applets. This flaw directly violates the security principle that expired certificates should not be trusted for executing code, as they no longer represent valid security assertions from trusted certificate authorities.
The technical implementation of this vulnerability occurs within the Java Plugin's certificate validation logic where the system accepts applets signed with expired certificates without proper verification of their validity period. When a user encounters a web page containing a signed applet, the Java Plugin performs certificate checks but incorrectly bypasses expiration date validation. This allows malicious actors to create applets with certificates that have already expired and still execute them successfully, effectively circumventing the intended security controls. The flaw exists in the certificate chain validation process where the plugin does not properly enforce the time-based validity constraints that should prevent execution of code signed with expired credentials.
From an operational perspective, this vulnerability creates severe implications for remote code execution and privilege escalation attacks. Attackers can exploit this weakness by creating malicious applets with expired certificates that appear legitimate to the user interface, potentially gaining unauthorized access to systems or executing arbitrary code with the privileges of the user running the Java Plugin. The impact extends beyond simple code execution as it undermines the entire certificate trust model that Java relies upon for secure applet execution. This vulnerability particularly affects enterprise environments where Java applets are commonly used for business applications, making it a significant concern for organizations that have not updated their Java installations.
The security implications of this vulnerability align with CWE-295, which addresses improper certificate validation, and can be mapped to ATT&CK technique T1059.007 for application execution through Java applets. Organizations should implement immediate mitigations including disabling Java applet execution in web browsers, updating to patched versions of Java Runtime Environment, and implementing network-level controls to prevent access to potentially malicious applet sources. Additionally, system administrators should conduct comprehensive vulnerability assessments to identify any systems still running vulnerable Java Plugin versions and ensure proper certificate management practices are in place. The vulnerability demonstrates the critical importance of maintaining up-to-date security implementations and proper certificate lifecycle management in preventing unauthorized code execution through trusted code signing mechanisms.