CVE-2005-3269 in Java System Directory Server
Summary
by MITRE
Stack-based buffer overflow in help.cgi in the HTTP administrative interface for (1) Sun Java System Directory Server 5.2 2003Q4, 2004Q2, and 2005Q1, (2) Red Hat Directory Server and (3) Certificate Server before 7.1 SP1, (4) Sun ONE Directory Server 5.1 SP4 and earlier, and (5) Sun ONE Administration Server 5.2 allows remote attackers to cause a denial of service (admin server crash), or local users to gain root privileges.
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Analysis
by VulDB Data Team • 06/29/2025
This vulnerability represents a critical stack-based buffer overflow in the help.cgi component of multiple directory server products from Sun Microsystems and Red Hat. The flaw exists within the HTTP administrative interface of these server applications, specifically in how the help.cgi script processes user input. The buffer overflow occurs when the application fails to properly validate the length of input data before copying it into a fixed-size stack buffer, creating an exploitable condition that can be leveraged by remote attackers to execute arbitrary code or cause system crashes.
The technical implementation of this vulnerability stems from improper input validation mechanisms within the help.cgi script that handles administrative requests. When processing user-supplied parameters through the HTTP interface, the application directly copies input data into a stack buffer without sufficient bounds checking. This allows an attacker to overflow the buffer and overwrite adjacent stack memory, potentially corrupting program execution flow. The vulnerability affects multiple versions of Sun Java System Directory Server, Red Hat Directory Server, Certificate Server, and Sun ONE Directory Server, indicating a widespread issue in the software's input handling mechanisms. According to CWE-121, this represents a classic stack-based buffer overflow vulnerability that can be exploited through improper boundary checking.
The operational impact of this vulnerability extends beyond simple denial of service conditions to include potential privilege escalation. Remote attackers can leverage the buffer overflow to crash the administrative server, causing denial of service that disrupts directory services. More critically, local users with access to the system can exploit this vulnerability to gain root privileges, effectively compromising the entire server infrastructure. This privilege escalation capability makes the vulnerability particularly dangerous as it allows attackers to establish persistent access to the system with elevated privileges. The vulnerability affects the core administrative functionality of directory services, which are fundamental to enterprise security infrastructure, potentially enabling attackers to compromise authentication systems and access sensitive data.
Mitigation strategies should focus on immediate patching of affected systems, as the vulnerability affects multiple vendor products that require specific updates to address the buffer overflow condition. Organizations should implement network segmentation to limit access to administrative interfaces and restrict the attack surface by disabling unnecessary administrative services. Additionally, input validation should be strengthened across all applications handling user-supplied data to prevent similar buffer overflow conditions. The vulnerability aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and T1499 which addresses 'Endpoint Denial of Service', emphasizing the need for both defensive measures and proactive monitoring to detect exploitation attempts. System administrators should also consider implementing intrusion detection systems to monitor for suspicious traffic patterns that may indicate exploitation attempts against the administrative interfaces.