CVE-2017-8761 Explained : Impact and Mitigation

OpenStack Swift versions 2.10.1, 2.11.0 to 2.13.0, and 2.14.0 contain a vulnerability that exposes reusable tempurl signatures to unauthorized individuals who have read access to the proxy-server logs. This affects all Swift deployments that utilize the tempurl middleware.

Understanding CVE-2017-8761

In OpenStack Swift through versions 2.10.1, 2.11.0 through 2.13.0, and 2.14.0, there is a security flaw that leaks reusable tempurl signatures to anyone with read access to the proxy-server logs.

What is CVE-2017-8761?

This CVE refers to a vulnerability in OpenStack Swift that allows unauthorized individuals with read access to the proxy-server logs to obtain reusable tempurl signatures, impacting deployments using the tempurl middleware.

The Impact of CVE-2017-8761

The vulnerability in OpenStack Swift can lead to unauthorized access to sensitive information and resources, compromising the security and confidentiality of data stored within affected Swift deployments.

Technical Details of CVE-2017-8761

OpenStack Swift versions 2.10.1, 2.11.0 to 2.13.0, and 2.14.0 are affected by this vulnerability.

Vulnerability Description

The issue exposes reusable tempurl signatures to unauthorized individuals with read access to the proxy-server logs, potentially compromising the security of Swift deployments.

Affected Systems and Versions

OpenStack Swift versions 2.10.1, 2.11.0 to 2.13.0, and 2.14.0

Exploitation Mechanism

Unauthorized individuals can exploit this vulnerability by accessing the proxy-server logs to obtain reusable tempurl signatures, bypassing security measures.

Mitigation and Prevention

To address CVE-2017-8761, immediate steps and long-term security practices are essential.

Immediate Steps to Take

Monitor and restrict access to proxy-server logs containing sensitive information.
Implement access controls to limit exposure of tempurl signatures.

Long-Term Security Practices

Regularly review and update access controls and security configurations.
Conduct security training to raise awareness of potential vulnerabilities and best practices.

Patching and Updates

Apply patches or updates provided by OpenStack Swift to mitigate the vulnerability and enhance system security.