CVE-2003-0448 in Portmon
Summary
by MITRE
Portmon 1.7 and possibly earlier versions allows local users to read and write arbitrary files via the (1) -c (host file) or (2) -l (log file) command line options.
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Analysis
by VulDB Data Team • 06/14/2018
The vulnerability identified as CVE-2003-0448 affects Portmon version 1.7 and earlier, representing a critical path traversal and privilege escalation flaw that enables local attackers to manipulate arbitrary files through command line interface options. This vulnerability stems from inadequate input validation and file access controls within the application's handling of command line parameters. The specific command line options -c and -l, which are intended for specifying host files and log files respectively, can be exploited by malicious local users to gain unauthorized access to system resources. When these parameters are improperly handled, they create opportunities for attackers to read or write files outside of the intended scope, effectively bypassing normal file system access controls.
This vulnerability operates at the intersection of several cybersecurity domains including privilege escalation, file system manipulation, and command line interface security. The flaw manifests as a classic case of insufficient validation of user-supplied data, where the application fails to properly sanitize or restrict file paths provided through command line arguments. From a technical perspective, the vulnerability represents a path traversal issue that can be categorized under CWE-22, which describes improper limitation of a pathname to a restricted directory. The attack vector is particularly concerning because it requires only local system access, making it accessible to users with minimal privileges who can leverage this flaw to access sensitive system files or modify critical application data.
The operational impact of this vulnerability extends beyond simple file access, as it can enable attackers to escalate privileges and potentially compromise the entire system. Local users who can execute Portmon with elevated privileges or those who gain access to a user account can exploit this vulnerability to read system configuration files, access sensitive logs, or modify application data. The implications are particularly severe in multi-user environments where the application might be running with elevated privileges. This vulnerability also aligns with ATT&CK technique T1059.001, which covers command and scripting interpreter execution, as the exploitation involves manipulating command line parameters to achieve unauthorized file access. The attack surface is further expanded because Portmon is typically used for network monitoring and logging activities, making it a valuable target for attackers seeking to gather system information or establish persistence.
The remediation approach for this vulnerability requires immediate patching of the affected Portmon versions to implement proper input validation and file path restriction mechanisms. System administrators should ensure that all instances of Portmon are updated to versions that address this specific flaw, as the vulnerability can be exploited without requiring network access or specialized tools. Additionally, implementing principle of least privilege access controls and monitoring for unusual file access patterns can help detect potential exploitation attempts. The vulnerability demonstrates the critical importance of validating all user inputs, particularly when those inputs are used to determine file system operations, and serves as a reminder that even seemingly benign applications can contain dangerous security flaws. Organizations should conduct regular security assessments of their monitoring and logging tools to identify similar vulnerabilities that could be exploited by local attackers to gain unauthorized access to system resources.