CVE-2022-3320 : What You Need to Know
CVE-2022-3320 allows bypassing of Cloudflare Zero Trust policies using warp-cli set-custom-endpoint command, impacting Cloudflare WARP on Windows, Linux, and MacOS. Read for impact and mitigation.
A detailed analysis of CVE-2022-3320 which involves the bypassing of Cloudflare Zero Trust policies using the warp-cli set-custom-endpoint command.
Understanding CVE-2022-3320
In this section, we will delve into what CVE-2022-3320 is, its impact, technical details, mitigation, and prevention strategies.
What is CVE-2022-3320?
CVE-2022-3320 allows attackers to bypass policies configured for Zero Trust Secure Web Gateway by utilizing the warp-cli 'set-custom-endpoint' subcommand. This results in the WARP Client disconnecting and enables the circumvention of administrative restrictions on a Zero Trust enrolled endpoint.
The Impact of CVE-2022-3320
The vulnerability, categorized under CAPEC-122 (Privilege Abuse) and CAPEC-554 (Functionality Bypass), has a CVSS v3.1 base score of 6.7 (Medium). It requires low privileges with local vector changes and user interaction, compromising integrity while having low availability impact.
Technical Details of CVE-2022-3320
Let's explore the specifics of the vulnerability.
Vulnerability Description
By misusing the warp-cli 'set-custom-endpoint' subcommand with an unreachable endpoint, bad actors can circumvent Zero Trust policies, posing a risk to endpoint security.
Affected Systems and Versions
Cloudflare's WARP product versions less than 2022.8.857.0 (Windows), 2022.8.936 (Linux), and 2022.8.861.0 (MacOS) are impacted by this vulnerability.
Exploitation Mechanism
Attackers can abuse the 'set-custom-endpoint' functionality to disconnect the WARP Client and bypass the defined security policies, granting unauthorized access to the endpoint.
Mitigation and Prevention
To secure your systems against CVE-2022-3320, consider implementing the following measures.
Immediate Steps to Take
Upgrade to the specified patched versions provided by Cloudflare to eliminate the vulnerability.
Long-Term Security Practices
Regularly update and patch your systems to prevent exploitation of known vulnerabilities and monitor for any unusual activity related to endpoint connectivity.