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CVE-2022-3320: CWE-862 Missing Authorization in Cloudflare WARP

Medium
VulnerabilityCVE-2022-3320cvecve-2022-3320cwe-862
Published: Fri Oct 28 2022 (10/28/2022, 09:30:17 UTC)
Source: CVE
Vendor/Project: Cloudflare
Product: WARP

Description

It was possible to bypass policies configured for Zero Trust Secure Web Gateway by using warp-cli 'set-custom-endpoint' subcommand. Using this command with an unreachable endpoint caused the WARP Client to disconnect and allowed bypassing administrative restrictions on a Zero Trust enrolled endpoint.

AI-Powered Analysis

AILast updated: 07/07/2025, 01:26:11 UTC

Technical Analysis

CVE-2022-3320 is a vulnerability identified in Cloudflare's WARP client, specifically related to its Zero Trust Secure Web Gateway functionality. The vulnerability arises from a missing authorization check (CWE-862) when using the 'warp-cli set-custom-endpoint' subcommand. By setting a custom endpoint to an unreachable address, an attacker or user could cause the WARP client to disconnect from the Zero Trust service. This disconnection effectively bypasses the administrative policies and restrictions that are normally enforced on endpoints enrolled in the Zero Trust environment. The vulnerability requires local privileges (PR:L) and user interaction (UI:R) to exploit, and it impacts the integrity of the system by allowing unauthorized policy bypass, with a low impact on availability and no impact on confidentiality. The CVSS v3.1 base score is 6.7 (medium severity), reflecting the moderate risk posed by this issue. No known exploits in the wild have been reported, and no patches were listed at the time of publication. This vulnerability could allow users to circumvent security controls designed to restrict or monitor web access, potentially enabling access to unauthorized resources or data.

Potential Impact

For European organizations, this vulnerability poses a significant risk to the enforcement of Zero Trust security policies, which are increasingly adopted to protect sensitive data and comply with regulations such as GDPR. The ability to bypass administrative restrictions could lead to unauthorized access to internal or cloud resources, increasing the risk of data leakage, lateral movement within networks, or exposure to malicious content. Although the vulnerability requires local access and user interaction, insider threats or compromised endpoints could exploit this to evade security controls. This undermines the trust in Zero Trust architectures and could complicate compliance efforts, especially in sectors with strict data protection requirements such as finance, healthcare, and government. The impact is particularly relevant for organizations relying heavily on Cloudflare WARP for secure remote access and web filtering.

Mitigation Recommendations

Organizations should ensure that all WARP clients are updated to the latest versions where this vulnerability is patched by Cloudflare. Until a patch is available, administrators should restrict local user permissions to prevent unauthorized use of the 'warp-cli' commands, particularly the 'set-custom-endpoint' subcommand. Endpoint security solutions should monitor and alert on unusual WARP client behavior, such as disconnections or changes to endpoint configurations. Additionally, network-level controls can be implemented to detect and block connections to suspicious or unreachable endpoints. User training to recognize and report anomalous client behavior can also reduce risk. Finally, organizations should review and strengthen their Zero Trust policy enforcement mechanisms to detect and respond to policy bypass attempts.

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Technical Details

Data Version
5.1
Assigner Short Name
cloudflare
Date Reserved
2022-09-26T16:40:57.968Z
Cisa Enriched
true
Cvss Version
3.1
State
PUBLISHED

Threat ID: 682d981fc4522896dcbdca14

Added to database: 5/21/2025, 9:08:47 AM

Last enriched: 7/7/2025, 1:26:11 AM

Last updated: 8/12/2025, 6:30:27 AM

Views: 12

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