Description
go-git is a highly extensible git implementation library written in pure Go. An argument injection vulnerability was discovered in go-git versions prior to v5.13. Successful exploitation of this vulnerability could allow an attacker to set arbitrary values to git-upload-pack flags. This only happens when the file transport protocol is being used, as that is the only protocol that shells out to git binaries. This vulnerability is fixed in 5.13.0.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-0045
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-0045 affects the go-git library, a highly extensible git implementation written in Go. The issue is an argument injection vulnerability present in versions prior to v5.13. This vulnerability allows an attacker to set arbitrary values to git-upload-pack flags when the file transport protocol is used. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, which is considered critical.
CVSS Base Score Vector Breakdown:
- AV:N (Attack Vector: Network) - The vulnerability is exploitable over the network.
- AC:L (Attack Complexity: Low) - The attack requires low complexity to exploit.
- PR:N (Privileges Required: None) - No privileges are required to exploit the vulnerability.
- UI:N (User Interaction: None) - No user interaction is required.
- S:U (Scope: Unchanged) - The scope of the vulnerability remains unchanged.
- C:H (Confidentiality: High) - High impact on confidentiality.
- I:H (Integrity: High) - High impact on integrity.
- A:H (Availability: High) - High impact on availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves exploiting the argument injection vulnerability when the file transport protocol is used. An attacker could manipulate the git-upload-pack flags to execute arbitrary commands or inject malicious arguments, potentially leading to unauthorized access, data manipulation, or denial of service.
Exploitation Methods:
- Command Injection: An attacker could inject malicious commands through the git-upload-pack flags, leading to arbitrary code execution.
- Data Manipulation: By setting arbitrary values, an attacker could manipulate data integrity, leading to unauthorized changes in the repository.
- Denial of Service: The attacker could exploit the vulnerability to disrupt the availability of the git service, causing a denial of service.
3. Affected Systems and Software Versions
The vulnerability affects go-git versions prior to v5.13. Specifically, versions 4.0.0 and all versions up to but not including 5.13.0 are vulnerable. Organizations using these versions of go-git in their applications or services are at risk.
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Upgrade to the Latest Version: Upgrade to go-git version 5.13.0 or later, which includes the fix for this vulnerability.
- Disable File Transport Protocol: If upgrading is not immediately possible, consider disabling the file transport protocol to mitigate the risk.
Long-Term Mitigation:
- Regular Patch Management: Implement a robust patch management process to ensure that all software dependencies are regularly updated.
- Code Review and Auditing: Conduct thorough code reviews and security audits to identify and address potential vulnerabilities in third-party libraries.
- Network Security Measures: Implement network security measures such as firewalls and intrusion detection systems to monitor and block suspicious activities.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to organizations within the European Union that rely on go-git for their git operations. Given the critical nature of the vulnerability, it could lead to widespread data breaches, unauthorized access, and service disruptions. The European cybersecurity landscape could see increased incidents of data manipulation and denial of service attacks if the vulnerability is not promptly addressed.
6. Technical Details for Security Professionals
Vulnerability Details:
- CVE ID: CVE-2025-21613
- GHSA ID: GHSA-v725-9546-7q7m
- Affected Product: go-git
- Affected Versions: 4.0.0, < 5.13.0
- Fixed Version: 5.13.0
References:
Technical Recommendations:
- Monitoring and Logging: Implement comprehensive monitoring and logging to detect any suspicious activities related to git operations.
- Access Controls: Enforce strict access controls to limit the exposure of git repositories to trusted users and systems.
- Incident Response Plan: Develop and maintain an incident response plan to quickly address any potential exploitation of this vulnerability.
By following these recommendations, organizations can effectively mitigate the risks associated with EUVD-2025-0045 and enhance their overall cybersecurity posture.