CVE-2012-2241 in devscripts
Summary
by MITRE
scripts/dget.pl in devscripts before 2.12.3 allows remote attackers to delete arbitrary files via a crafted (1) .dsc or (2) .changes file, probably related to a NULL byte in a filename.
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Analysis
by VulDB Data Team • 12/14/2021
The vulnerability identified as CVE-2012-2241 affects the devscripts package version 2.12.2 and earlier, specifically targeting the scripts/dget.pl utility. This flaw represents a critical directory traversal and arbitrary file deletion vulnerability that enables remote attackers to compromise systems by manipulating specially crafted package description files. The vulnerability stems from insufficient input validation within the file processing logic, creating a pathway for malicious actors to execute unauthorized file operations on affected systems.
The technical implementation of this vulnerability occurs through the manipulation of .dsc and .changes package files used in debian package management systems. When the dget.pl script processes these files, it fails to properly sanitize filename parameters that may contain null bytes or other malicious characters. This improper handling allows attackers to craft package metadata that, when processed, results in the deletion of arbitrary files on the target system. The vulnerability is particularly dangerous because it leverages legitimate package management workflows to execute malicious operations, making detection more challenging.
The operational impact of this vulnerability extends beyond simple file deletion to encompass potential system compromise and data loss. Attackers can exploit this weakness to remove critical system files, configuration data, or user information, potentially leading to complete system instability or unauthorized access. The vulnerability affects systems that process debian package metadata, including build servers, package repositories, and development environments where these scripts are regularly executed. This creates a broad attack surface across various infrastructure components that rely on proper package management workflows.
Security professionals should prioritize patching affected systems immediately, updating to devscripts version 2.12.3 or later where the vulnerability has been addressed through improved input validation and filename sanitization. Additional mitigations include restricting execution permissions on the vulnerable scripts, implementing network segmentation to limit access to package management systems, and monitoring for suspicious package file modifications. The vulnerability aligns with CWE-22 Directory Traversal and CWE-77 Path Traversal, while also mapping to ATT&CK techniques involving privilege escalation and resource hijacking through legitimate system tools. Organizations should conduct comprehensive vulnerability assessments to identify any systems that might be running vulnerable versions and implement proper input validation controls to prevent similar issues in other applications processing user-supplied file metadata.