CVE-2022-31733 : Security Advisory and Response
CVE-2022-31733 allows attackers to access applications on diego cells without proper mTLS authentication, impacting Cloud Foundry Diego and CF Deployment versions between specified ranges.
Starting with diego-release 2.55.0 and up to 2.69.0, and starting with CF Deployment 17.1 and up to 23.2.0, apps are accessible via another port on diego cells, allowing application ingress without a client certificate. If mTLS route integrity is enabled AND unproxied ports are turned off, then an attacker could connect to an application that should be only reachable via mTLS, without presenting a client certificate.
Understanding CVE-2022-31733
This CVE affects Cloud Foundry Diego and CF Deployment, impacting versions between certain specified ranges.
What is CVE-2022-31733?
CVE-2022-31733 highlights a vulnerability where applications can be accessed through an alternate port on diego cells, potentially bypassing security measures.
The Impact of CVE-2022-31733
This vulnerability could allow an attacker to connect to an application that should require an mTLS client certificate without presenting one, compromising the integrity of mTLS route security.
Technical Details of CVE-2022-31733
The technical details include the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability allows unauthorized access to applications on diego cells through an unsecured port, circumventing standard security measures.
Affected Systems and Versions
Cloud Foundry Diego versions between 2.55.0 and 2.69.0, as well as CF Deployment versions between 17.1 and 23.2.0, are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by connecting to applications that should only be accessible via mTLS, without presenting the required client certificate.
Mitigation and Prevention
To mitigate the risks associated with CVE-2022-31733, immediate steps should be taken along with a focus on long-term security practices.
Immediate Steps to Take
Administrators should ensure that mTLS route integrity is strictly enforced, and unproxied ports are turned off to prevent unauthorized access to applications.
Long-Term Security Practices
Implement regular security audits, configure strict access controls, and stay updated on security advisories to enhance overall system security.
Patching and Updates
Cloud Foundry Diego and CF Deployment users should apply relevant patches provided by the vendor to address this vulnerability.