Sensitive Data Exposure in cifs-utils: Kerberos Credential Disclosure Vulnerability
Summary
CVE-2025-2312: A flaw was found in cifs-utils. Affects cifs-utils versions 2:7.0-2 – 2:7.4-1. No fix is published. How to fix ↓
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Background
cifs-utils is a package that provides utilities for mounting and managing CIFS (Common Internet File System) shares. It is widely used in Linux environments to facilitate file sharing between different operating systems. The package includes tools for managing Kerberos authentication, which is crucial for secure communication in networked environments. However, a recent vulnerability has been identified that may expose sensitive Kerberos credentials in containerized setups, potentially compromising the security of the host system.
Vulnerability Detail
A flaw was found in the cifs-utils package, specifically in the cifs.upcall program. When attempting to obtain Kerberos credentials, this program erroneously makes an upcall to the wrong namespace in containerized environments. This misdirection can lead to the unintended disclosure of sensitive data from the host's Kerberos credentials cache, posing a significant security risk to systems relying on Kerberos for authentication.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, consider isolating the cifs-utils operations from sensitive environments or using alternative methods for Kerberos authentication until the package can be updated.
Conclusion
The CVE-2025-2312 vulnerability in the cifs-utils package poses a serious risk of exposing sensitive Kerberos credentials in containerized environments. It is crucial to update to the patched version of the package to safeguard your systems. Additionally, using tools like Vulert can help monitor and alert you to open-source vulnerabilities in real-time.
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FAQ
CVE-2025-2312 is a vulnerability in the cifs-utils package that can lead to the exposure of sensitive Kerberos credentials in containerized environments.
If your system uses cifs-utils for managing CIFS shares and operates in a containerized environment, this vulnerability may allow unauthorized access to your host's Kerberos credentials.
You should update the cifs-utils package to the latest patched version to mitigate the risk of credential exposure.
Yes, you can use tools like Vulert, which monitors open-source vulnerabilities in your software using a manifest file like package-lock.json.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
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