CVE-2020-28422 in git-archive
Summary
by MITRE • 07/25/2022
All versions of package git-archive are vulnerable to Command Injection via the exports function.
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Analysis
by VulDB Data Team • 08/27/2022
The vulnerability identified as CVE-2020-28422 affects the git-archive package across all its versions and represents a critical command injection flaw that can be exploited through the exports function. This issue stems from inadequate input validation and sanitization within the package's export functionality, creating a pathway for malicious actors to execute arbitrary commands on systems where the vulnerable package is installed. The vulnerability manifests when the package processes user-supplied data during export operations, failing to properly escape or validate command parameters that are subsequently passed to system execution functions.
The technical exploitation of this vulnerability occurs when an attacker can influence the parameters passed to the exports function, potentially allowing them to inject malicious commands that will be executed with the privileges of the user running the git-archive process. This type of vulnerability falls under the CWE-78 category known as "Improper Neutralization of Special Elements used in OS Commands," which is a well-documented weakness in software systems where user-controllable data is directly incorporated into system command execution without proper sanitization. The vulnerability is particularly dangerous in environments where the git-archive package is used with elevated privileges or in automated workflows where command execution could be leveraged for privilege escalation or system compromise.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to gain unauthorized access to system resources, potentially leading to full system compromise. Attackers could exploit this vulnerability to execute arbitrary code, read sensitive files, modify system configurations, or establish persistent access through the compromised system. The vulnerability is especially concerning in continuous integration/continuous deployment environments where git-archive might be used in automated build processes, as successful exploitation could allow attackers to modify source code or compromise the integrity of the entire software supply chain. This aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter, where adversaries leverage legitimate system tools to execute malicious commands.
Organizations should immediately assess their environments for the presence of vulnerable git-archive package versions and implement mitigation strategies including immediate package updates to the latest secure versions. The recommended approach involves conducting comprehensive inventory audits to identify all systems utilizing the git-archive package, implementing proper input validation and sanitization measures, and establishing network segmentation to limit the potential impact of successful exploitation. Additionally, organizations should consider implementing runtime protection mechanisms and monitoring for suspicious command execution patterns. The vulnerability highlights the importance of maintaining up-to-date software dependencies and implementing robust security controls around automated systems where command execution is involved. Security teams should also consider implementing automated vulnerability scanning tools that can detect the presence of vulnerable package versions and provide alerts when potential exploitation attempts are detected.