CVE-2002-1061 in Jana Web Server
Summary
by MITRE
Multiple buffer overflows in Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) an HTTP GET request with a long major version number, (2) an HTTP GET request to the HTTP proxy on port 3128 with a long major version number, (3) a long OK reply from a POP3 server, and (4) a long SMTP server response.
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Analysis
by VulDB Data Team • 09/10/2025
The vulnerability identified as CVE-2002-1061 represents a critical security flaw in the Thomas Hauck Jana Server software across multiple versions including 1.4.6 and earlier, as well as 2.x through 2.2.1 releases. This vulnerability manifests through multiple attack vectors that exploit buffer overflow conditions in the server's handling of various network protocols. The affected server software operates as a web server and proxy server, making it a prime target for attackers seeking to compromise systems through remote exploitation. The vulnerability specifically impacts the server's ability to process HTTP GET requests, POP3 server responses, and SMTP server responses, all of which can trigger memory corruption through improper input validation.
The technical implementation of this vulnerability stems from inadequate bounds checking in the server's protocol parsing logic. When processing HTTP GET requests with excessively long major version numbers, the server fails to validate input length before copying data into fixed-size buffers, creating conditions where attacker-controlled data can overwrite adjacent memory locations. This same flaw exists in the HTTP proxy functionality listening on port 3128, where long version strings can trigger similar buffer overflow conditions. Additionally, the POP3 and SMTP protocol handlers contain identical vulnerabilities where responses from remote servers containing excessive data can cause buffer overflows. These buffer overflows occur because the server's code does not properly enforce maximum length constraints on protocol data, allowing attackers to craft malicious requests that exceed allocated buffer space and overwrite critical memory areas.
The operational impact of CVE-2002-1061 is severe and multifaceted, potentially enabling both denial of service conditions and remote code execution capabilities. When exploited, the buffer overflow conditions can cause the server process to crash and restart repeatedly, resulting in persistent denial of service that disrupts legitimate user access to web services. More critically, successful exploitation could allow attackers to inject and execute arbitrary code within the server's execution context, potentially providing complete system compromise. The vulnerability affects systems running vulnerable versions of the Jana Server software, which would typically be deployed in environments requiring web serving and proxy functionality. Attackers can leverage this vulnerability from remote locations without requiring authentication, making it particularly dangerous for publicly accessible servers.
Mitigation strategies for CVE-2002-1061 should prioritize immediate software updates to versions that address the buffer overflow conditions. System administrators should implement network segmentation and access controls to limit exposure of vulnerable servers to untrusted networks. The implementation of input validation measures at network boundaries can help detect and block malformed requests before they reach vulnerable components. Additionally, monitoring systems should be configured to detect unusual patterns of service disruption or abnormal network traffic that might indicate exploitation attempts. Security professionals should consider implementing intrusion detection systems with signatures specific to the vulnerable protocols and request patterns. According to CWE classification, this vulnerability maps to CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers stack-based buffer overflow scenarios. The attack patterns align with ATT&CK techniques including T1203 for Exploitation for Client Execution and T1499 for Endpoint Denial of Service, demonstrating both the execution and denial of service capabilities inherent in this vulnerability. Organizations should also conduct thorough vulnerability assessments to identify any other systems running vulnerable versions of the Jana Server software and ensure comprehensive patch management processes are in place to prevent similar issues in the future.