CVE-2010-5265 in SmartSniff
Summary
by MITRE
Untrusted search path vulnerability in SmartSniff 1.71 allows local users to gain privileges via a Trojan horse wpcap.dll file in the current working directory, as demonstrated by a directory that contains a .cfg or .ssp file. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 02/21/2019
The vulnerability described in CVE-2010-5265 represents a critical untrusted search path issue affecting SmartSniff version 1.71, a network protocol analyzer tool. This flaw stems from the application's improper handling of dynamic library loading mechanisms, where the software searches for required components in the current working directory before examining system paths. The vulnerability manifests when an attacker places a malicious wpcap.dll file in the same directory as a legitimate .cfg or .ssp configuration file, exploiting the predictable execution flow that prioritizes local directory searches over system security controls.
This type of vulnerability falls under CWE-426, which specifically addresses the execution of untrusted code due to the application's failure to properly validate or sanitize the search path used for loading dynamic link libraries. The attack vector leverages the principle of least privilege violation by enabling local users to execute arbitrary code with the privileges of the targeted application. When SmartSniff processes a configuration file, it automatically loads the wpcap.dll library from the current working directory without verifying its authenticity or source, creating a classic Trojan horse scenario where legitimate application functionality is subverted by malicious code.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a persistent foothold within the system. The attack requires minimal sophistication since it relies on social engineering or directory manipulation rather than complex exploitation techniques. Once the malicious wpcap.dll is loaded, it can execute arbitrary commands, potentially leading to complete system compromise, data exfiltration, or further lateral movement within the network. The vulnerability is particularly concerning because it affects applications that run with elevated privileges and handle sensitive network traffic data.
Mitigation strategies for this vulnerability should focus on implementing proper library loading practices and enforcing secure coding standards. Organizations should ensure that SmartSniff is updated to a version that properly validates library paths or consider implementing application whitelisting controls to prevent unauthorized DLL loading. The solution involves configuring the application to search system directories first, using absolute paths for library loading, or implementing digital signatures verification for dynamic libraries. Additionally, system administrators should monitor for unusual directory modifications and implement least privilege principles to limit the potential damage from such attacks. This vulnerability aligns with ATT&CK technique T1059, which covers command and scripting interpreter usage, and T1068, which addresses local privilege escalation through trusted application paths.