CVE-2005-1261 in Gaim
Summary
by MITRE
Stack-based buffer overflow in the URL parsing function in Gaim before 1.3.0 allows remote attackers to execute arbitrary code via an instant message (IM) with a large URL.
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Analysis
by VulDB Data Team • 12/17/2024
The vulnerability described in CVE-2005-1261 represents a critical stack-based buffer overflow affecting the Gaim instant messaging client version 1.2.1 and earlier. This flaw resides within the URL parsing functionality of the application, specifically in how it handles incoming instant messages containing excessively long URLs. The issue stems from inadequate input validation and bounds checking during the processing of URL data within the messaging framework, creating a condition where malicious actors can exploit memory corruption to gain unauthorized code execution privileges. The vulnerability operates by overflowing the stack buffer when parsing URLs that exceed the allocated memory space, potentially allowing attackers to overwrite adjacent memory locations including return addresses and function pointers.
The technical implementation of this vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which occurs when a program writes data beyond the bounds of a fixed-length stack buffer. In the context of Gaim's URL parsing function, attackers can craft malicious instant messages containing URLs that exceed the buffer capacity, typically measured in bytes. The stack overflow creates an exploitable condition where the program's execution flow can be manipulated through controlled data injection. This type of vulnerability is particularly dangerous because it allows for arbitrary code execution, enabling attackers to run malicious payloads with the privileges of the affected application process. The exploitation requires the target user to receive and process the malicious IM, making social engineering a critical component of the attack vector.
The operational impact of CVE-2005-1261 extends beyond simple code execution, as it fundamentally compromises the integrity and confidentiality of instant messaging communications. Attackers can leverage this vulnerability to gain complete control over affected systems, potentially establishing persistent backdoors, exfiltrating sensitive information, or using the compromised machine as a launching point for further attacks within a network. The vulnerability affects the core messaging functionality of Gaim, which was widely used for instant communication across various protocols including AIM, ICQ, and MSN. Given the nature of instant messaging platforms, this vulnerability could be exploited at scale, as users typically receive and process numerous messages daily, increasing the probability of successful exploitation.
Mitigation strategies for CVE-2005-1261 focus on both immediate remediation and long-term architectural improvements. The primary solution involves upgrading to Gaim version 1.3.0 or later, which includes proper bounds checking and input validation mechanisms for URL parsing operations. Organizations should implement network monitoring to detect unusual traffic patterns that might indicate exploitation attempts, particularly around instant messaging protocols. Security controls should include input sanitization at multiple layers, ensuring that URL data is truncated or rejected when exceeding predefined length limits. The vulnerability demonstrates the importance of defensive programming practices and adheres to ATT&CK technique T1059.007 for Command and Scripting Interpreter, where attackers could leverage the overflow to execute arbitrary commands through the compromised application. Additionally, network segmentation and application whitelisting can limit the potential damage from successful exploitation by restricting the attacker's ability to move laterally within the network environment.