CVE-2010-3130 in Snagit
Summary
by MITRE
Untrusted search path vulnerability in TechSmith Snagit 10 (Build 788) allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse dwmapi.dll that is located in the same folder as a snag, snagcc, or snagprof file.
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Analysis
by VulDB Data Team • 01/21/2025
The vulnerability identified as CVE-2010-3130 represents a critical untrusted search path issue affecting TechSmith Snagit 10 version 788 and potentially earlier releases. This flaw manifests within the application's dynamic link library loading mechanism, where the software fails to properly validate the source of dynamically loaded libraries. The vulnerability specifically impacts the application's handling of dwmapi.dll files, which are legitimate Windows system libraries used for desktop window management. When users open or process snag, snagcc, or snagprof files, the application searches for required libraries in the same directory as these files, creating an exploitable condition where malicious actors can place a crafted dwmapi.dll file alongside legitimate Snagit files.
The technical exploitation of this vulnerability occurs through a classic DLL hijacking attack vector where an attacker places a malicious dwmapi.dll file in the same directory as a targeted Snagit file. When the application processes these files, it loads the malicious library instead of the legitimate Windows system library, allowing arbitrary code execution with the privileges of the victim user. This vulnerability operates at the operating system level, leveraging the Windows library loading order which prioritizes local directories over system paths, a behavior that has been documented in various security frameworks and commonly referenced in the CWE catalog under weakness category 787. The attack can be initiated locally by an unprivileged user who has write access to the directory containing Snagit files, or potentially remotely if the application processes files from untrusted sources.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a persistent foothold for further exploitation within the victim environment. The attack surface includes any user who might open or process Snagit files, making it particularly dangerous in enterprise environments where file sharing occurs frequently. The vulnerability's potential for remote exploitation, though not definitively confirmed, suggests that network-based attacks could be possible if attackers can influence the contents of directories containing Snagit files. This type of vulnerability aligns with ATT&CK technique T1574.001 which covers DLL hijacking, and represents a common attack pattern in the cybersecurity landscape where applications fail to properly validate library loading paths. The vulnerability demonstrates how seemingly benign application features can create significant security risks when proper input validation and secure coding practices are not implemented.
Mitigation strategies for this vulnerability should focus on both immediate remediation and long-term architectural improvements. The most effective immediate solution involves updating to a patched version of TechSmith Snagit, as the vendor would have implemented proper library loading mechanisms that prioritize system paths over local directories. Organizations should also implement privilege separation by running Snagit with minimal required privileges and by employing application whitelisting solutions that prevent execution of unsigned or untrusted binaries. Additionally, security awareness training should emphasize the dangers of opening files from untrusted sources, particularly in shared or networked environments. The vulnerability highlights the importance of secure coding practices such as using absolute paths for library loading, implementing proper DLL search path validation, and following the principle of least privilege in application design. System administrators should also consider implementing file integrity monitoring to detect unauthorized modifications to application directories and regularly audit file permissions to prevent unauthorized DLL placement.