Service interruption via shared proxy parser state
Published Aug 21, 2024 · Updated Aug 7, 2026
Race condition in Undertow before 2.2.36.Final and 2.3.0.Alpha1 through 2.3.16.Final allows remote attackers to interrupt service. ProxyProtocolReadListener keeps one StringBuilder as object state, so concurrent parseProxyProtocolV1 calls append to and read from shared request data. The flaw is reachable when PROXY protocol v1 parsing handles multiple requests on one HTTP connection; it primarily causes parser errors and connection termination, while stale values cross request boundaries.
Summary
What happened
Race condition in Undertow before 2.2.36.Final and 2.3.0.Alpha1 through 2.3.16.Final allows remote attackers to interrupt service. ProxyProtocolReadListener keeps one StringBuilder as object state, so concurrent parseProxyProtocolV1 calls append to and read from shared request data. The flaw is reachable when PROXY protocol v1 parsing handles multiple requests on one HTTP connection; it primarily causes parser errors and connection termination, while stale values cross request boundaries.
The record
- CVE
- CVE-2024-7885
- Published
- Aug 21, 2024
- Updated
- Aug 7, 2026
- Vendor
- Red Hat
- Product
- Red Hat JBoss Enterprise Application Platform 7
- Classifications
- CWE-362, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 21, 2024CVE publishedPublication date reported by the CVE source.
- Aug 7, 2026Record 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
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