CVE-2025-48386 is a medium-severity vulnerability within the Git version control system, particularly affecting the wincred credential helper. This vulnerability allows for potential buffer overflow conditions as this credential helper does not properly check the bounds of the buffer before writing data to it. The CVSS score of 6.3 categorizes this vulnerability as a medium risk, which indicates a notable potential for exploitation in local environments.
Risk to organizations includes the potential for unauthorized access to sensitive information due to the buffer overflow. Given the nature of its operation, if exploited, an attacker may manipulate the buffer to influence the behavior of the application, leading to data exposure or corruption.
As of now, there is no known exploit available for this vulnerability. However, the risk remains that it could be leveraged in local attack scenarios. Organizations should prioritize patching the affected Git versions as soon as possible to mitigate possible risks.
The urgency to address this vulnerability is moderate, and organizations should schedule remediation in their patch cycles to ensure security and stability within their systems.
Vulnerability Details
The official CVE description states that Git, a distributed revision control system, has a vulnerability in its wincred credential helper. This helper uses a static buffer for key storage but fails to properly check the available space before writing to it. The improper use of the wcsncat() function can lead to buffer overflows. This issue has been addressed in several versions: v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1, and v2.50.1.
The vulnerability is classified under CWE-120, indicating that it presents a risk of buffer overflow. The CVSS score of 6.3 implies a medium severity level, with a low attack complexity and no privileges required for exploitation, although user interaction is necessary.
Technical Analysis
The root cause of CVE-2025-48386 lies in the improper bounds checking within the wincred credential helper of Git. The vulnerability manifests through the use of the vulnerable wcsncat() function, which can append data beyond the buffer's allocated size, resulting in potential buffer overflows.
The attack vector for this vulnerability is local, meaning an attacker must have local access to the system to exploit it. The attack complexity is low, as no specialized knowledge is required to execute the attack. No privileges are required to execute the attack, but user interaction is needed to invoke the credential helper.
In terms of impact, the confidentiality impact is high since an attacker may access sensitive information stored in the credential helper. There is no integrity or availability impact associated with this vulnerability.
Risk & Impact Analysis
The real-world risk posed by this vulnerability is significant, particularly for environments where Git is widely used for development. The potential for unauthorized access to sensitive credentials could have a severe blast radius, especially in collaborative development settings or systems where Git is integrated with other services.
Organizations should consider the implications of this vulnerability on their development processes, as the risk of credential exposure could facilitate further attacks or data breaches. Given the CVSS score of 6.3 and the potential attack vectors, it is crucial that organizations address this vulnerability in their prioritization of upcoming patch cycles.
Immediate action is advised, with organizations encouraged to schedule remediation as soon as possible. This vulnerability highlights the importance of maintaining up-to-date software and the need for continuous monitoring of security advisories to protect against evolving threats.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions affected by CVE-2025-48386 are all versions prior to the vendor patch, specifically: v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1, and v2.50.1.
Mitigation & Remediation
Organizations should prioritize patching to the latest version of Git to remediate the vulnerabilities. The fixed versions are v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1, and v2.50.1. If patches are not immediately available, organizations should implement configuration hardening and review access controls to limit exposure.
To further enhance security, organizations may consider engaging in penetration testing to identify potential vulnerabilities in their environment.
Detection Guidance
Organizations should monitor their logs for any unusual behavior associated with the wincred credential helper. Behavioral anomalies, such as unexpected credential storage or access attempts, should be investigated. Additionally, establishing network signatures to detect unauthorized access attempts may prove beneficial.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-48386 lies in its demonstration of how even well-established tools like Git can harbor vulnerabilities that, if unaddressed, could lead to significant security breaches. Security teams should take this as a reminder to regularly review and update their systems.
This vulnerability highlights the importance of proactive vulnerability management and the need for continuous security testing, including vulnerability management programs. Organizations must remain vigilant and ensure that all components, including third-party tools, are securely configured and regularly updated.
To further enhance defense mechanisms, organizations can also consider engaging in cloud penetration testing to evaluate their security posture in cloud environments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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