CVE-2019-10255 : What You Need to Know
Learn about CVE-2019-10255, an Open Redirect vulnerability in Jupyter Notebook and JupyterHub versions before 5.7.7 and 0.9.5, allowing crafted links to redirect users to malicious sites post-login.
Crafted links to the login page in Jupyter Notebook versions prior to 5.7.7 and certain browsers (Chrome, Firefox) in JupyterHub versions prior to 0.9.5 can exploit an Open Redirect vulnerability. This vulnerability enables redirection to a malicious website after a successful login. Servers operating with a base_url prefix are not impacted by this vulnerability.
Understanding CVE-2019-10255
This CVE involves an Open Redirect vulnerability in Jupyter Notebook and JupyterHub, potentially allowing malicious redirection after successful login.
What is CVE-2019-10255?
An Open Redirect vulnerability in Jupyter Notebook versions before 5.7.7 and certain browsers in JupyterHub versions before 0.9.5 allows crafted links to the login page, redirecting users to malicious sites post-login.
The Impact of CVE-2019-10255
- Successful exploitation can lead to users unknowingly visiting malicious websites after logging into Jupyter Notebook or JupyterHub.
- Servers using a base_url prefix are not affected by this vulnerability.
Technical Details of CVE-2019-10255
This section provides technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows crafted links to the login page, redirecting users to malicious sites after successful login.
Affected Systems and Versions
- Jupyter Notebook versions before 5.7.7
- JupyterHub versions before 0.9.5
- Browsers like Chrome and Firefox
Exploitation Mechanism
Crafted links to the login page can exploit the Open Redirect vulnerability, redirecting users to malicious websites.
Mitigation and Prevention
Protecting systems from CVE-2019-10255 is crucial to maintain security.
Immediate Steps to Take
- Update Jupyter Notebook and JupyterHub to versions 5.7.7 and 0.9.5, respectively.
- Avoid clicking on suspicious links received via these platforms.
Long-Term Security Practices
- Educate users about the risks of clicking on unknown links.
- Regularly monitor and update security patches for Jupyter environments.
- Implement URL filtering and validation mechanisms to prevent Open Redirect attacks.
- Consider using security tools to detect and block malicious redirection attempts.
Patching and Updates
- Apply the patches provided by Jupyter Notebook and JupyterHub to address the Open Redirect vulnerability.