Open redirect via encoded newline in rewrite back-reference
Published Apr 1, 2020 · Updated Aug 4, 2024
Open redirect in mod_rewrite in Apache HTTP Server 2.4.0 through 2.4.41 allows remote attackers to redirect users via crafted URLs. Self-referential RewriteRule redirects process percent-decoded URL-path back-references, so an encoded newline makes the resulting Location value point to an attacker-controlled site. Exploitation requires a vulnerable rewrite rule and user interaction; the bounded consequence is navigation away from the trusted site.
Summary
What happened
Open redirect in mod_rewrite in Apache HTTP Server 2.4.0 through 2.4.41 allows remote attackers to redirect users via crafted URLs. Self-referential RewriteRule redirects process percent-decoded URL-path back-references, so an encoded newline makes the resulting Location value point to an attacker-controlled site. Exploitation requires a vulnerable rewrite rule and user interaction; the bounded consequence is navigation away from the trusted site.
The record
- CVE
- CVE-2020-1927
- Published
- Apr 1, 2020
- Updated
- Aug 4, 2024
- Vendor
- The Apache Software Foundation
- Product
- Apache HTTP Server
- Classifications
- CWE-601
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 1, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.4.0 to 2.4.41
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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