HTTP Request Smuggling via Chunked Extension Quoted-String Parsing
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 12.1.7, 12.0.33, 11.0.29, 10.0.28, 9.4.60
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- 1 proof of concept on GitHub
- Exploitation: poc
- Automatable: no
- Technical impact: total
Summary
In Eclipse Jetty, the HTTP/1.1 parser is vulnerable to request smuggling when chunk extensions are used, similar to the "funky chunks" techniques outlined here: • https://w4ke.info/2025/06/18/funky-chunks.html • https://w4ke.info/2025/10/29/funky-chunks-2.html Jetty terminates chunk extension parsing at \r\n inside quoted strings instead of treating this as an error. POST / HTTP/1.1 Host: localhost Transfer-Encoding: chunked 1;ext="val X 0 GET /smuggled HTTP/1.1 ... Note how the chunk extension does not close the double quotes, and it is able to inject a smuggled request.
Timeline
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: total
- CVE published
- Record last updated
Affected versions
- pkg://maven/org.eclipse.jetty/jetty-http
From 12.1.0 · through 12.1.6; From 12.0.0 · through 12.0.32; From 11.0.0 · through 11.0.28; From 10.0.0 · through 10.0.27; From 9.4.0 · through 9.4.59
- org.eclipse.jetty:jetty-httpMaven
From 12.1.0 · fixed in 12.1.7
- org.eclipse.jetty:jetty-httpMaven
From 12.0.0 · fixed in 12.0.33
- org.eclipse.jetty:jetty-httpMaven
From 11.0.0 · fixed in 11.0.29
- org.eclipse.jetty:jetty-httpMaven
From 10.0.0 · fixed in 10.0.28
- org.eclipse.jetty:jetty-httpMaven
From 9.4.0 · fixed in 9.4.60