CVE-2025-21613 is a critical vulnerability affecting the go-git library, a highly extensible implementation of Git written in pure Go. This vulnerability allows attackers to exploit an argument injection flaw in versions prior to v5.13. This flaw can lead to arbitrary values being set for git-upload-pack flags when the file transport protocol is used, which is particularly concerning as it interacts with git binaries. The severity of this vulnerability is underscored by its CVSS score of 9.2, indicating a critical risk level.
The exploitation of this vulnerability poses significant risks to organizations that utilize the go-git library in their applications. Attackers may leverage this weakness to manipulate git operations, potentially leading to unauthorized access and data integrity issues. As the vulnerability affects a fundamental library used for version control, the impact could be widespread, affecting various applications relying on go-git functionalities.
Given the critical nature of this vulnerability and its potential for exploitation, organizations should prioritize patching immediately. The vulnerability has been addressed in version 5.13.0 of the go-git library. Immediate action is recommended to mitigate risks and protect systems from potential attacks.
As of now, there are no known public exploits or proof-of-concept (PoC) for this vulnerability, but the exploitability is categorized as critical. Organizations relying on go-git should be vigilant and ensure that they have upgraded to the patched version to avoid potential risks.
Vulnerability Details
The vulnerability is described as an argument injection issue within the go-git library. The critical nature of the vulnerability is reflected in its CVSS score of 9.2, derived from factors such as the attack vector being network-based, low attack complexity, and high impacts on confidentiality, integrity, and availability. The affected product is the go-git library, with the vendor being go-git_project. This vulnerability was published on January 6, 2025.
Technical Analysis
The root cause of this vulnerability lies in how the go-git library handles command-line arguments for git operations when using the file transport protocol. The lack of adequate validation allows an attacker to inject arbitrary values into git-upload-pack flags, which can lead to unauthorized command execution. The attack vector is classified as network-based, meaning an attacker can exploit this vulnerability remotely.
The attack complexity is low, requiring no special privileges or user interaction. Thus, an attacker can execute the attack without needing to authenticate, making it particularly dangerous. The confidentiality, integrity, and availability impacts are all rated as high, indicating that successful exploitation could lead to severe consequences.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access and manipulation of git repositories, which could affect the integrity of version-controlled data. The blast radius is significant as many applications utilize the go-git library for version control, making various systems vulnerable. Organizations should assess their use of go-git and prioritize remediation based on the critical nature of this vulnerability.
Given the CVSS score and the high potential for exploitation, organizations should address this vulnerability in their priority patch cycle. The lack of public exploits does not diminish the urgency, as the exploitation status remains critical, necessitating immediate attention.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch (5.13.0) are affected. Organizations using any prior version of the go-git library should update to the latest version to mitigate this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to version 5.13.0 or later of the go-git library. If immediate patching is not possible, organizations should consider implementing network controls to restrict access to vulnerable components. Additionally, reviewing configurations for any potential exposure to this vulnerability is essential.
For ongoing security assurance, organizations may also consider engaging in penetration testing to validate the effectiveness of their security measures against such vulnerabilities.
Detection Guidance
Organizations should monitor logs for any unusual activity related to git operations. Behavioral anomalies, such as unexpected git commands or configurations, should be investigated promptly. Network signatures indicating unauthorized access attempts should also be analyzed.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-21613 lies in the increasing reliance on libraries like go-git for source control and collaboration in software development. The argument injection vulnerability highlights the need for robust security practices in library development and integration. Security teams should prioritize understanding such vulnerabilities to strengthen their defensive posture against potential exploits.
This incident underscores the importance of keeping dependencies up to date and continuously assessing the security landscape. Organizations are encouraged to adopt a proactive approach to security, ensuring that they remain vigilant against similar vulnerabilities.
As part of a comprehensive security strategy, teams should engage in penetration testing methodology to identify potential weaknesses before they can be exploited.
Finally, organizations may benefit from exploring vulnerability management programs to enhance their overall security posture and ensure timely responses to emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)