Response-header disclosure via omitted AJP message
Published Jun 21, 2023 · Updated Feb 13, 2025
Information disclosure in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74, and 8.5.88 allows remote attackers to read prior response headers. The AJP response path skips SEND_HEADERS when an application sets no headers, causing mod_proxy_ajp to reuse headers retained from the preceding request. Exploitation requires an AJP proxy and backend-connection reuse; the bounded consequence is disclosure of earlier response headers.
Summary
What happened
Information disclosure in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74, and 8.5.88 allows remote attackers to read prior response headers. The AJP response path skips SEND_HEADERS when an application sets no headers, causing mod_proxy_ajp to reuse headers retained from the preceding request. Exploitation requires an AJP proxy and backend-connection reuse; the bounded consequence is disclosure of earlier response headers.
The record
- CVE
- CVE-2023-34981
- Published
- Jun 21, 2023
- Updated
- Feb 13, 2025
- Vendor
- The Apache Software Foundation
- Product
- Apache Tomcat
- Classifications
- CWE-732
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 21, 2023CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record 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=10.1.8
- Affected versionversion=11.0.0
- Affected versionversion=11.0.0-M5
- Affected versionversion=8.5.88
- Affected versionversion=9.0.74
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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