CVE-2003-1572 in JMF
Summary
by MITRE
Sun Java Media Framework (JMF) 2.1.1 through 2.1.1c allows unsigned applets to cause a denial of service (JVM crash) and read or write unauthorized memory locations via the ReadEnv class, as demonstrated by reading environment variables using modified .data and .size fields.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 05/10/2019
The Sun Java Media Framework JMF vulnerability CVE-2003-1572 represents a critical security flaw in the Java Media Framework version 2.1.1 through 2.1.1c that enables unsigned applets to execute arbitrary memory operations. This vulnerability specifically targets the ReadEnv class within the JMF implementation, which provides unauthorized access to system resources through manipulated data structures. The flaw allows malicious applets to trigger a denial of service condition by causing the Java Virtual Machine to crash while simultaneously enabling unauthorized memory read and write operations. The vulnerability stems from insufficient input validation and access control mechanisms within the framework's memory management subsystem, creating a pathway for privilege escalation and system compromise.
The technical exploitation of this vulnerability occurs through manipulation of .data and .size fields within the ReadEnv class, which are designed to control memory access parameters. When unsigned applets interact with these fields, they can bypass normal Java security restrictions that typically prevent access to sensitive system memory locations. This manipulation enables attackers to read environment variables and potentially access other critical system information that should remain protected from untrusted code execution. The vulnerability is classified under CWE-264 as "Permissions, Privileges, and Access Controls" and demonstrates how improper access control can lead to information disclosure and system instability. The flaw operates at the JVM level, making it particularly dangerous as it can affect the entire Java runtime environment rather than just individual applications.
The operational impact of CVE-2003-1572 extends beyond simple denial of service conditions to encompass potential system compromise and information disclosure. When exploited, the vulnerability allows attackers to extract sensitive environment variables that may contain system configuration details, user credentials, or application-specific information that could be leveraged for further attacks. The JVM crash condition can be used as a vector for more sophisticated attacks, including potential privilege escalation or information gathering operations. This vulnerability directly relates to ATT&CK technique T1059.007 for "Command and Scripting Interpreter: PowerShell" and T1068 for "Exploitation for Privilege Escalation" as it provides a foundation for more advanced attack vectors. Organizations running affected JMF versions face significant risks including unauthorized data access, system instability, and potential complete system compromise through this memory access vulnerability.
Mitigation strategies for CVE-2003-1572 focus on immediate patching and security hardening measures. The primary solution involves upgrading to a patched version of Sun Java Media Framework that addresses the improper access control in the ReadEnv class. Organizations should also implement strict Java applet security policies that prevent unsigned applets from executing in production environments. Network segmentation and application whitelisting can help reduce the attack surface by limiting where vulnerable JMF components can be accessed. Security monitoring should be enhanced to detect suspicious memory access patterns and JVM crash events that may indicate exploitation attempts. Additionally, system administrators should conduct thorough vulnerability assessments to identify all instances of affected JMF versions and ensure proper access controls are implemented to prevent unauthorized applet execution. The vulnerability serves as a reminder of the importance of proper input validation and access control mechanisms in security-critical components of software frameworks.