CVE-2017-18036 Explained : Impact and Mitigation
Learn about CVE-2017-18036 affecting Atlassian Bitbucket Server prior to 5.3.0, enabling remote attackers to identify open ports through SSRF vulnerability. Find mitigation steps here.
Atlassian Bitbucket Server prior to version 5.3.0 is affected by a Server Side Request Forgery (SSRF) vulnerability that allows remote attackers to identify open ports of a service they couldn't access otherwise.
Understanding CVE-2017-18036
This CVE identifies a security vulnerability in Atlassian Bitbucket Server that could be exploited by attackers to perform SSRF attacks.
What is CVE-2017-18036?
The SSRF vulnerability in Atlassian Bitbucket Server prior to version 5.3.0 enables remote attackers to identify open ports of a service they couldn't access otherwise, through the Github repository importer feature.
The Impact of CVE-2017-18036
This vulnerability allows attackers to bypass security restrictions and potentially gather sensitive information about the target system.
Technical Details of CVE-2017-18036
Atlassian Bitbucket Server prior to version 5.3.0 is susceptible to the following:
Vulnerability Description
The Github repository importer in Atlassian Bitbucket Server before version 5.3.0 allows remote attackers to determine if a service they could not otherwise reach has open ports via a Server Side Request Forgery (SSRF) vulnerability.
Affected Systems and Versions
- Product: Bitbucket Server
- Vendor: Atlassian
- Versions Affected: Prior to 5.3.0
Exploitation Mechanism
Attackers can exploit this vulnerability through the Github repository importer feature to identify open ports of inaccessible services.
Mitigation and Prevention
To address CVE-2017-18036, consider the following steps:
Immediate Steps to Take
- Upgrade Atlassian Bitbucket Server to version 5.3.0 or later to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity that could indicate SSRF attacks.
Long-Term Security Practices
- Implement strict input validation to prevent SSRF vulnerabilities.
- Regularly update and patch software to address known security issues.
Patching and Updates
- Apply security patches provided by Atlassian promptly to protect against SSRF attacks.