Request smuggling via malformed HTTP/2 pseudo-headers
Published Aug 10, 2022 · Updated Aug 3, 2024
HTTP/2 header validation in Apache Traffic Server 8.0.0 through 9.1.2 allows remote attackers to smuggle requests through the proxy. The parser continued processing invalid pseudo-headers and accepted scheme values outside RFC 3986 syntax instead of rejecting the malformed request. Exploitation requires an HTTP/2 client connection and can inject requests into downstream processing, violating integrity without reported disclosure or interruption.
Summary
What happened
HTTP/2 header validation in Apache Traffic Server 8.0.0 through 9.1.2 allows remote attackers to smuggle requests through the proxy. The parser continued processing invalid pseudo-headers and accepted scheme values outside RFC 3986 syntax instead of rejecting the malformed request. Exploitation requires an HTTP/2 client connection and can inject requests into downstream processing, violating integrity without reported disclosure or interruption.
The record
- CVE
- CVE-2022-31779
- Published
- Aug 10, 2022
- Updated
- Aug 3, 2024
- Vendor
- The Apache Software Foundation
- Product
- Apache Traffic Server
- Classifications
- CWE-20, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 10, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 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=8.0.0 to 9.1.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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