URL-filter bypass via overbroad hostname prefix matching
Published Feb 10, 2022 · Updated Sep 16, 2024
Interpretation conflict in Palo Alto Networks PAN-OS and Prisma Access allows remote authenticated users to bypass URL filtering. Custom URL categories and external dynamic lists treat an unterminated hostname or trailing-asterisk pattern as a raw URL prefix, so a crafted longer hostname matches the exception. The issue is reachable only when such exceptions are used in a URL Filtering profile or security policy, and it can permit access to sites that the policy was intended to block.
Summary
What happened
Interpretation conflict in Palo Alto Networks PAN-OS and Prisma Access allows remote authenticated users to bypass URL filtering. Custom URL categories and external dynamic lists treat an unterminated hostname or trailing-asterisk pattern as a raw URL prefix, so a crafted longer hostname matches the exception. The issue is reachable only when such exceptions are used in a URL Filtering profile or security policy, and it can permit access to sites that the policy was intended to block.
The record
- CVE
- CVE-2022-0011
- Published
- Feb 10, 2022
- Updated
- Sep 16, 2024
- Vendor
- Palo Alto Networks
- Product
- PAN-OS
- Classifications
- CWE-436
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 10, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 2024Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=10.0 <10.0.8 changes=[{"at":"10.0.8","status":"unaffected"}]
- Affected versionversion=10.1 <10.1.3 changes=[{"at":"10.1.3","status":"unaffected"}]
- Affected versionversion=8.1 <8.1.21 changes=[{"at":"8.1.21","status":"unaffected"}]
- Affected versionversion=9.0.*
- Affected versionversion=9.1 <9.1.12 changes=[{"at":"9.1.12","status":"unaffected"}]
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Attacks
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