Prolonged security-service disconnection via client clock manipulation
Published Sep 7, 2023 · Updated Sep 26, 2024
Client-side enforcement in Cloudflare WARP Mobile Client before 6.29 for Android allows local users to prolong a permitted disconnect. The override workflow accepts an expiration derived from the device date and time without server-side validation, so changing the local clock extends the authorized interval. Exploitation requires local access and an administrator-issued override code; the consequence is a prolonged interruption of WARP protection.
Summary
What happened
Client-side enforcement in Cloudflare WARP Mobile Client before 6.29 for Android allows local users to prolong a permitted disconnect. The override workflow accepts an expiration derived from the device date and time without server-side validation, so changing the local clock extends the authorized interval. Exploitation requires local access and an administrator-issued override code; the consequence is a prolonged interruption of WARP protection.
The record
- CVE
- CVE-2023-3747
- Published
- Sep 7, 2023
- Updated
- Sep 26, 2024
- Vendor
- Cloudflare
- Product
- Cloudflare WARP
- Classifications
- CWE-602, CWE-565, CAPEC-207, T1562
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 7, 2023CVE publishedPublication date reported by the CVE source.
- Sep 26, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <6.29 changes=[{"at":"6.29","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo