CVE-2013-3485 in Soda PDF
Summary
by MITRE
Multiple untrusted search path vulnerabilities in Soda PDF 5.1.183.10520 allow local users to gain privileges via a Trojan horse (1) dwmapi.dll or (2) api-ms-win-core-localregistry-l1-1-0.dll file in the current working directory.
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Analysis
by VulDB Data Team • 12/26/2024
The vulnerability identified as CVE-2013-3485 represents a critical untrusted search path issue affecting Soda PDF version 5.1.183.10520. This flaw stems from the application's improper handling of dynamic link library loading mechanisms, creating a privilege escalation vector that can be exploited by local attackers. The vulnerability specifically targets two critical system components: dwmapi.dll and api-ms-win-core-localregistry-l1-1-0.dll, which are essential Windows system libraries. The issue arises when the application searches for these libraries in the current working directory before checking the system library paths, creating an opportunity for malicious actors to place crafted versions of these libraries in strategic locations.
This vulnerability falls under the CWE-426 category of Untrusted Search Path, which is classified as a high-severity weakness in software security. The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and data exposure. When local users can manipulate the search path to load malicious libraries, they effectively gain the ability to execute arbitrary code with the privileges of the target application. The attack vector is particularly insidious because it leverages legitimate system components that are expected to be present and trusted, making detection more challenging for security monitoring systems. The dwmapi.dll component is responsible for desktop window manager functionality while api-ms-win-core-localregistry-l1-1-0.dll handles core registry operations, both of which are critical system components that could provide extensive access when compromised.
From an attack perspective, this vulnerability aligns with several techniques documented in the MITRE ATT&CK framework under the Privilege Escalation and Defense Evasion tactics. The local user can exploit this weakness by placing malicious DLL files in the application's working directory, effectively bypassing normal security controls. This approach is particularly effective in environments where users have local access but not administrative privileges, as it allows them to escalate their privileges to those of the running application. The vulnerability demonstrates a classic case of DLL hijacking, where the system loads a malicious library instead of the legitimate one due to improper search path ordering. Security controls that rely on file path validation or library integrity checks would be ineffective against this attack, as the malicious libraries are placed in the expected search locations. Organizations using Soda PDF in enterprise environments face significant risk, as this vulnerability can be exploited to gain elevated privileges and potentially access sensitive data or system resources.
The recommended mitigation strategies for this vulnerability encompass both immediate remediation and long-term security hardening approaches. The most direct solution involves applying the vendor-provided security patch or upgrading to a newer version of Soda PDF that addresses this specific search path issue. System administrators should also implement proper privilege controls and access restrictions to limit local user capabilities, particularly in environments where such applications are deployed. Additionally, implementing application whitelisting policies and monitoring for unusual DLL loading behavior can help detect potential exploitation attempts. Security teams should also consider deploying endpoint protection solutions that can monitor and prevent unauthorized DLL injection attempts. The vulnerability highlights the importance of secure coding practices, particularly in how applications handle dynamic library loading, and emphasizes the need for defense-in-depth strategies that protect against multiple attack vectors. Organizations should also conduct regular security assessments to identify similar untrusted search path vulnerabilities in other applications and systems, as this type of flaw is relatively common in software development practices.