CVE-2007-5689 in JRE
Summary
by MITRE
The Java Virtual Machine (JVM) in Sun Java Runtime Environment (JRE) in SDK and JRE 1.3.x through 1.3.1_20 and 1.4.x through 1.4.2_15, and JDK and JRE 5.x through 5.0 Update 12 and 6.x through 6 Update 2, allows remote attackers to execute arbitrary programs, or read or modify arbitrary files, via applets that grant privileges to themselves.
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Analysis
by VulDB Data Team • 06/02/2025
The vulnerability described in CVE-2007-5689 represents a critical security flaw in the Sun Java Runtime Environment that affects multiple versions of Java 1.3.x through 1.4.2 and Java 5.x through 6 Update 2. This issue specifically targets the Java Virtual Machine implementation where applets can potentially escalate their privileges beyond the intended security boundaries. The flaw allows malicious actors to execute arbitrary code or gain unauthorized access to file systems through specially crafted applets that improperly grant themselves elevated privileges. The vulnerability stems from insufficient sandboxing mechanisms within the JVM that should normally isolate applet execution from the underlying operating system resources.
The technical nature of this vulnerability aligns with CWE-264, which addresses permissions, privileges, and access controls in software systems. Attackers can exploit this weakness by crafting malicious applets that bypass the standard security model implemented by the Java sandbox. These applets can manipulate the security manager to grant themselves excessive permissions, effectively breaking down the isolation barriers that protect the host system from potentially harmful code execution. The vulnerability manifests when the JVM fails to properly validate or enforce security restrictions that should prevent applets from accessing local files, executing system commands, or performing other privileged operations. This flaw particularly affects versions where the security model was not fully hardened against crafted privilege escalation attempts.
The operational impact of CVE-2007-5689 extends far beyond simple code execution, as it can result in complete system compromise when exploited. Attackers can leverage this vulnerability to read sensitive files from the local system, modify critical data, or execute arbitrary programs with the privileges of the user running the Java runtime environment. This makes the vulnerability particularly dangerous in enterprise environments where Java applets are commonly used for web-based applications and business processes. The vulnerability affects a broad range of Java versions, making it a widespread concern across many deployed systems and applications that rely on the Java platform for execution. Organizations running affected Java versions face significant risk of data breaches, system compromise, and unauthorized access to sensitive information.
Mitigation strategies for this vulnerability should focus on immediate patching of affected Java installations to the latest available versions that contain security fixes. System administrators must ensure that all Java runtime environments are updated to versions that address the privilege escalation issues present in the vulnerable versions. Additionally, organizations should implement network-level controls to restrict access to potentially malicious applets and consider disabling Java applet execution in web browsers where possible. The mitigation approach should also include monitoring for suspicious activities and implementing proper access controls to limit the damage that could occur if exploitation were to succeed. Security teams should also review their existing security policies and procedures to ensure that they account for the risks associated with legacy Java versions and implement proper patch management processes to prevent similar vulnerabilities from remaining unaddressed.