CVE-2017-8040 : What You Need to Know
Learn about CVE-2017-8040, an XXE vulnerability in PCF Single Sign-On for PCF versions 1.3.x prior to 1.3.4 and 1.4.x prior to 1.4.3. Find out the impact, affected systems, and mitigation steps.
A vulnerability has been identified in the Single Sign-On service dashboard of versions 1.3.x before 1.3.4 and 1.4.x before 1.4.3 of Single Sign-On for Pivotal Cloud Foundry (PCF). This vulnerability allows privileged users to upload XML files with malicious structure, which can result in the disclosure of data on the Single Sign-On service broker file system.
Understanding CVE-2017-8040
This CVE involves an XXE (XML External Entity) vulnerability in the Single Sign-On service dashboard of specific PCF versions.
What is CVE-2017-8040?
CVE-2017-8040 is an XXE vulnerability found in the Single Sign-On service dashboard of PCF versions 1.3.x prior to 1.3.4 and 1.4.x prior to 1.4.3.
The Impact of CVE-2017-8040
The vulnerability allows privileged users to upload malformed XML files, potentially leading to data exposure on the Single Sign-On service broker file system.
Technical Details of CVE-2017-8040
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
An XXE attack was discovered in the Single Sign-On service dashboard of PCF versions 1.3.x before 1.3.4 and 1.4.x before 1.4.3, enabling users to upload malicious XML files.
Affected Systems and Versions
- Product: PCF Single Sign-On for PCF
- Versions Affected: 1.3.x versions prior to 1.3.4, 1.4.x versions prior to 1.4.3
Exploitation Mechanism
The vulnerability allows privileged users to upload XML files with a malicious structure, potentially leading to data disclosure on the Single Sign-On service broker file system.
Mitigation and Prevention
Protecting systems from CVE-2017-8040 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update PCF Single Sign-On to versions 1.3.4 and 1.4.3 to mitigate the vulnerability.
- Monitor and restrict file uploads to prevent malicious XML files.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement access controls to limit privileged user actions.
Patching and Updates
Ensure timely installation of security patches and updates to prevent exploitation of vulnerabilities.