CVE-2004-0262 in The Palace
Summary
by MITRE
Stack-based buffer overflow in The Palace 3.5 and earlier client allows remote attackers to execute arbitrary code via a link to a palace:// url followed by a long server address string.
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Analysis
by VulDB Data Team • 06/22/2018
The vulnerability described in CVE-2004-0262 represents a critical stack-based buffer overflow affecting The Palace 3.5 and earlier client software versions. This flaw exists within the client application's handling of palace:// protocol URLs, specifically when processing server address strings that exceed predetermined buffer limits. The vulnerability stems from inadequate input validation and bounds checking mechanisms within the client's URL parsing routine, creating an exploitable condition where maliciously crafted URLs can trigger memory corruption. The Palace client software, designed for multimedia communication and virtual environments, processes these custom protocol URLs to establish connections with remote servers, making this vulnerability particularly dangerous in networked environments where users might encounter malicious links.
The technical exploitation of this vulnerability occurs through a carefully constructed palace:// URL that includes an excessively long server address string, typically exceeding the allocated buffer space on the stack. When the client processes this malformed URL, the overflow corrupts adjacent memory locations including return addresses and control data, allowing remote attackers to overwrite critical program execution flow. This type of buffer overflow maps directly to CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking permits memory corruption. The vulnerability's remote exploitability means attackers can deliver malicious URLs through various vectors including web pages, email attachments, or instant messaging systems, without requiring local access to the target system. The attack leverages the client's automatic URL processing behavior, making user interaction with malicious links the primary attack vector.
The operational impact of CVE-2004-0262 extends beyond simple code execution, potentially enabling complete system compromise and unauthorized access to user environments. Successful exploitation allows attackers to execute arbitrary code with the privileges of the affected user, potentially leading to data theft, system takeover, or deployment of additional malware. The vulnerability affects users in virtual communication environments where The Palace client is actively used, creating risks for organizations relying on this software for collaborative workspaces or virtual meeting platforms. Network administrators face challenges in protecting against this threat since the attack can occur through legitimate web browsing activities, making traditional network-based detection difficult. The vulnerability's presence in widely distributed client software versions means that exploitation could affect numerous users across different organizations, creating a significant security risk for enterprises relying on virtual collaboration tools.
Mitigation strategies for CVE-2004-0262 should focus on immediate software updates and enhanced input validation practices. Organizations must prioritize updating The Palace client to versions that address this buffer overflow vulnerability, as no effective workarounds exist for the affected versions. System administrators should implement network-based filtering to block palace:// protocol URLs or restrict access to known malicious domains. Security monitoring should include detection of malformed URL patterns and unusual client behavior that might indicate exploitation attempts. The vulnerability demonstrates the importance of proper input validation and bounds checking, principles that align with ATT&CK technique T1059.007 for command and scripting interpreter usage, where attackers might leverage such vulnerabilities to establish persistent access. Additionally, implementing application whitelisting policies can prevent execution of untrusted client software, while regular security assessments should verify that no other similar buffer overflow conditions exist in legacy software systems.