CVE-2017-18038 : Security Advisory and Response

A vulnerability in Atlassian Bitbucket Server prior to version 5.6.0 allows remote attackers to access and retrieve files through a path traversal exploit.

Understanding CVE-2017-18038

This CVE involves a security issue in Atlassian Bitbucket Server that could be exploited by attackers.

What is CVE-2017-18038?

The vulnerability in Bitbucket Server's repository settings resource permits remote access to retrieve the initial line of any file by manipulating the default branch name.

The Impact of CVE-2017-18038

This vulnerability could lead to unauthorized access to sensitive information stored in files within the Bitbucket Server.

Technical Details of CVE-2017-18038

Details about the technical aspects of the CVE.

Vulnerability Description

The flaw in Atlassian Bitbucket Server allows attackers to read the first line of arbitrary files through a path traversal vulnerability using the default branch name.

Affected Systems and Versions

Product: Bitbucket Server
Vendor: Atlassian
Versions Affected: Prior to 5.6.0

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating the default branch name to access and retrieve the initial line of files.

Mitigation and Prevention

Ways to address and prevent the CVE.

Immediate Steps to Take

Upgrade Bitbucket Server to version 5.6.0 or later to mitigate the vulnerability.
Monitor and restrict access to sensitive files and repositories.

Long-Term Security Practices

Regularly update and patch Bitbucket Server to address security vulnerabilities.
Implement access controls and least privilege principles to limit exposure to sensitive data.

Patching and Updates

Ensure timely installation of security patches and updates provided by Atlassian to protect against known vulnerabilities.