CVE-2005-0633 in Trillian Pro
Summary
by MITRE
Buffer overflow in Trillian 3.0 and Pro 3.0 allows remote attackers to execute arbitrary code via a crafted PNG image file.
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Analysis
by VulDB Data Team • 07/21/2017
The vulnerability identified as CVE-2005-0633 represents a critical buffer overflow flaw affecting Trillian instant messaging clients version 3.0 and Pro 3.0. This security defect stems from insufficient input validation within the application's image processing capabilities, specifically when handling portable network graphics format files. The flaw manifests when the vulnerable software attempts to parse maliciously crafted PNG image files, creating an exploitable condition that can be leveraged by remote attackers to gain unauthorized system control.
This buffer overflow vulnerability operates through a classic memory corruption mechanism where the application fails to properly bounds-check data when processing image metadata. The flaw falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflow conditions, and more broadly aligns with CWE-787, which covers out-of-bounds write vulnerabilities. The technical implementation involves the application's failure to validate the size of incoming PNG data structures, particularly the image dimensions and color palette information, allowing attackers to overflow predetermined buffer boundaries in memory.
The operational impact of this vulnerability extends beyond simple remote code execution, as it enables attackers to completely compromise the targeted system. When a user views or processes the malicious PNG file through the vulnerable Trillian client, the buffer overflow can be exploited to overwrite critical memory segments including return addresses and function pointers. This memory corruption can be manipulated to redirect program execution flow, ultimately allowing attackers to inject and execute arbitrary code with the privileges of the affected user. The attack vector requires no special privileges from the attacker beyond the ability to deliver the malicious file to a target system, making it particularly dangerous in environments where users frequently exchange multimedia content.
The exploitation of this vulnerability aligns with several techniques documented in the ATT&CK framework under the T1190 category for exploitation of remote services and T1059 for command and scripting interpreter usage. Organizations utilizing Trillian instant messaging clients in their communication infrastructure face significant risk from this vulnerability, particularly in environments where users may receive files from untrusted sources. The attack scenario typically involves an attacker crafting a specially designed PNG file that triggers the buffer overflow during normal image rendering operations within the messaging client. This vulnerability demonstrates the importance of input sanitization and proper memory management in client-side applications that process untrusted multimedia content, highlighting the need for robust security practices in software development lifecycle processes.
Mitigation strategies for CVE-2005-0633 include immediate application of vendor security patches released for Trillian version 3.0 and Pro 3.0, which typically address the buffer overflow through proper bounds checking and input validation mechanisms. Network administrators should implement strict file type filtering and content scanning measures to prevent malicious PNG files from reaching end-user systems. Additionally, users should be educated about the risks of opening untrusted multimedia files and the importance of keeping software updated. The vulnerability serves as a reminder of the critical importance of secure coding practices and regular security assessments, particularly for applications that process external data in environments where user safety and system integrity are paramount considerations.