CVE-2011-0872 in JRE
Summary
by MITRE
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 6 Update 25 and earlier allows remote attackers to affect availability via unknown vectors related to NIO.
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Analysis
by VulDB Data Team • 11/08/2021
The vulnerability identified as CVE-2011-0872 resides within the Java Runtime Environment component of Oracle Java SE versions 6 Update 25 and earlier, specifically impacting the Network I/O (NIO) functionality. This unspecified weakness represents a critical security flaw that enables remote attackers to compromise system availability through mechanisms related to the NIO subsystem. The vulnerability's classification as unspecified indicates that the exact technical details of the flaw were not fully disclosed in the initial advisory, leaving security professionals to analyze potential attack vectors through indirect means and behavioral patterns.
The technical nature of this vulnerability is rooted in the NIO implementation within the Java Runtime Environment, which handles network input/output operations for applications. When attackers exploit this weakness, they can manipulate the NIO subsystem to cause system instability or complete service disruption. The NIO component in Java provides non-blocking I/O operations that are essential for high-performance network applications, making it a prime target for availability-focused attacks. This vulnerability specifically targets the underlying mechanisms that govern how Java applications interact with network resources through the NIO framework.
From an operational perspective, this vulnerability presents a significant risk to systems running affected Java versions as it allows remote attackers to potentially cause denial of service conditions. Attackers could leverage this weakness to disrupt network services, cause application crashes, or force system restarts, thereby compromising the availability of critical infrastructure. The remote nature of the attack means that adversaries do not require physical access to the target system, making the vulnerability particularly dangerous in networked environments where Java applications are deployed across multiple servers and platforms.
Security professionals should note that this vulnerability aligns with common attack patterns documented in the ATT&CK framework under the T1499 category for network denial of service, and may relate to CWE-119 which addresses weaknesses in memory management and input validation. The impact extends beyond simple service disruption as it could potentially allow attackers to exhaust system resources, causing cascading failures in network-dependent applications. Organizations running affected Java versions should prioritize immediate patching and mitigation strategies to prevent exploitation. The vulnerability demonstrates the critical importance of keeping Java runtime environments updated, as older versions often contain unpatched flaws that can be easily exploited by threat actors.
Mitigation strategies should include immediate deployment of Oracle's security patches for Java SE 6 Update 25 and earlier versions, along with network segmentation to limit exposure of vulnerable systems. Organizations should also implement monitoring solutions to detect anomalous network behavior that might indicate exploitation attempts. Additionally, application-level defenses such as input validation and resource limiting can help reduce the potential impact of successful attacks. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar weaknesses in other components of the Java ecosystem, as this vulnerability highlights the need for comprehensive security management across all runtime environments.