CVE-2005-1232 in Java System Web Proxy Server
Summary
by MITRE
Buffer overflow in Sun Java System Web Proxy Server (aka Sun ONE Proxy Server) 3.6 SP6 allows remote attackers to execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 07/02/2019
The vulnerability identified as CVE-2005-1232 represents a critical buffer overflow flaw within Sun Java System Web Proxy Server version 3.6 SP6, formerly known as Sun ONE Proxy Server. This security weakness resides in the proxy server's handling of input data, specifically within its processing mechanisms that manage network requests and responses. The flaw manifests when the server receives malformed or excessively large input data that exceeds the allocated buffer space, creating an exploitable condition that can be leveraged by remote attackers to gain unauthorized system access. The vulnerability's classification as a buffer overflow aligns with CWE-121, which details heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The attack surface is particularly concerning given the proxy server's role as a network intermediary that processes requests from multiple clients and forwards them to backend servers, making it a prime target for exploitation.
The technical implementation of this vulnerability involves the proxy server's insufficient validation of incoming data streams, particularly in how it processes HTTP headers, URL parameters, or other request elements that may contain excessive data. When the server attempts to store or process data exceeding the predetermined buffer limits, memory corruption occurs that can be manipulated by attackers to overwrite critical program execution pointers or return addresses. This memory corruption creates opportunities for code execution, allowing malicious actors to inject and run arbitrary code on the vulnerable system. The attack vectors remain unspecified in the original CVE description, but typically such buffer overflows in proxy servers can be triggered through malformed HTTP requests, oversized headers, or specially crafted URL sequences that exploit the server's input parsing routines. The vulnerability's exploitation does not require authentication, making it particularly dangerous as attackers can leverage it from any network location without prior access credentials.
The operational impact of this vulnerability extends beyond simple unauthorized code execution, as it can provide attackers with complete control over the affected proxy server. Once exploited, attackers can manipulate the proxy's functionality to redirect traffic, intercept communications, or use the compromised server as a pivot point for further attacks against internal network resources. The proxy server's role as a gateway between client systems and backend services means that successful exploitation could compromise entire network infrastructures, potentially allowing attackers to bypass security controls and access sensitive data. The vulnerability's presence in a widely deployed enterprise proxy solution amplifies its potential impact, as organizations relying on this software for network traffic management and security enforcement could face significant operational disruptions and security breaches. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1190, which covers exploits for execution through proxy server manipulation, and represents a critical threat vector for lateral movement and privilege escalation within network environments.
Mitigation strategies for CVE-2005-1232 must include immediate patch application from Sun Microsystems, which would address the underlying buffer overflow condition through proper input validation and bounds checking mechanisms. Organizations should implement network segmentation and access controls to limit exposure of the vulnerable proxy server to untrusted networks, while also deploying intrusion detection systems to monitor for exploitation attempts. The implementation of input sanitization measures and regular security assessments of proxy server configurations can help reduce the attack surface and detect potential exploitation attempts. Additionally, organizations should consider alternative proxy solutions or updated versions of the software that have addressed this vulnerability, as the original version 3.6 SP6 represents an outdated release that likely lacks modern security hardening features. Security teams should also establish incident response procedures specifically addressing proxy server compromises, given the critical nature of these systems in enterprise network architectures and their potential to serve as attack launch points for broader security incidents.