CVE-2013-7085 in devscripts
Summary
by MITRE
Uscan in devscripts 2.13.5, when USCAN_EXCLUSION is enabled, allows remote attackers to delete arbitrary files via a whitespace character in a filename.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/12/2022
The vulnerability identified as CVE-2013-7085 resides within the uScan component of devscripts version 2.13.5, representing a critical file deletion flaw that emerges when the USCAN_EXCLUSION feature is activated. This vulnerability exploits a fundamental weakness in how filename handling is processed within the software's scanning and exclusion mechanisms. The flaw specifically manifests when a malicious actor crafts a filename containing whitespace characters that can be interpreted by the uScan utility in a manner that permits arbitrary file deletion operations.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the uScan module's file handling routines. When USCAN_EXCLUSION is enabled, the system processes exclusion patterns that should prevent certain files from being scanned or processed. However, the absence of proper whitespace character handling in filename validation creates a path where specially crafted filenames can bypass normal file access controls. The vulnerability exploits command injection principles where whitespace characters are interpreted by shell commands invoked during the scanning process, allowing attackers to manipulate file system operations through seemingly benign filename inputs.
This flaw presents significant operational impact across various deployment scenarios where devscripts is utilized for package management and software distribution. Systems running affected versions of devscripts are particularly vulnerable when processing packages from untrusted sources or when automated scanning processes are enabled. The remote exploitation capability means that attackers can trigger this vulnerability from external networks without requiring local system access, making it especially dangerous in enterprise environments where package repositories are publicly accessible. The arbitrary file deletion capability could potentially be leveraged to remove critical system files, compromise package integrity, or disrupt automated build processes.
The vulnerability aligns with CWE-77 and CWE-22 categories, specifically addressing command injection and path traversal weaknesses that have been extensively documented in security frameworks. From an ATT&CK perspective, this vulnerability maps to T1059.007 for command and scripting interpreter and T1070.004 for file deletion through manipulation of system processes. Organizations utilizing affected devscripts versions should immediately implement mitigation strategies including disabling USCAN_EXCLUSION when not required, implementing strict filename validation policies, and applying the latest security patches from upstream maintainers. Network segmentation and access controls should be strengthened to limit exposure of systems running vulnerable versions, while monitoring systems should be configured to detect unusual file deletion patterns that might indicate exploitation attempts.