Authorization Before Parsing and Canonicalization in jetty
Release 9.4.37 introduced a more precise implementation of RFC3986 with regards to URI decoding, together with some new compliance modes to optionally allow support of some URI that may have ambiguous interpretation within the Servlet specified API methods behaviours. The default mode allowed % encoded . characters to be excluded for URI normalisation, which is correct by the RFC, but is not assumed by common Servlet implementations. The default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application. Workarounds found by HttpCompliance mode RFC7230_NO_AMBIGUOUS_URIS can be enabled by updating start.d/http.ini to include: jetty.http.compliance=RFC7230_NO_AMBIGUOUS_URIS.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.eclipse.jetty:jetty-webapp | >= 9.4.37, < 9.4.39 | 9.4.39 |
References
- https://github.com/eclipse/jetty.project/security/advisories/GHSA-v7ff-8wcx-gmc5
- https://nvd.nist.gov/vuln/detail/CVE-2021-28164
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://security.netapp.com/advisory/ntap-20210611-0006
- https://lists.apache.org/thread.html/rd7c8fb305a8637480dc943ba08424c8992dccad018cd1405eb2afe0e@%3Cdev.ignite.apache.org%3E
- https://lists.apache.org/thread.html/rd0471252aeb3384c3cfa6d131374646d4641b80dd313e7b476c47a9c@%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/rcea249eb7a0d243f21696e4985de33f3780399bf7b31ea1f6d489b8b@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rbc075a4ac85e7a8e47420b7383f16ffa0af3b792b8423584735f369f@%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r9974f64723875052e02787b2a5eda689ac5247c71b827d455e5dc9a6@%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r90e7b4c42a96d74c219e448bee6a329ab0cd3205c44b63471d96c3ab@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r8e6c116628c1277c3cf132012a66c46a0863fa2a3037c0707d4640d4@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r7dd079fa0ac6f47ba1ad0af98d7d0276547b8a4e005f034fb1016951@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r780c3c210a05c5bf7b4671303f46afc3fe56758e92864e1a5f0590d0@%3Cjira.kafka.apache.org%3E
- https://lists.apache.org/thread.html/r763840320a80e515331cbc1e613fa93f25faf62e991974171a325c82@%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r6ac9e263129328c0db9940d72b4a6062e703c58918dd34bd22cdf8dd@%3Cissues.ignite.apache.org%3E
- https://lists.apache.org/thread.html/r5b3693da7ecb8a75c0e930b4ca26a5f97aa0207d9dae4aa8cc65fe6b@%3Cissues.ignite.apache.org%3E
- https://lists.apache.org/thread.html/r4b1fef117bccc7f5fd4c45fd2cabc26838df823fe5ca94bc42a4fd46@%3Cissues.ignite.apache.org%3E
- https://lists.apache.org/thread.html/r4a66bfbf62281e31bc1345ebecbfd96f35199eecd77bfe4e903e906f@%3Cissues.ignite.apache.org%3E
- https://lists.apache.org/thread.html/r3c55b0baa4dc38958ae147b2f216e212605f1071297f845e14477d36@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r2ea2f0541121f17e470a0184843720046c59d4bde6d42bf5ca6fad81@%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r2a3ea27cca2ac7352d392b023b72e824387bc9ff16ba245ec663bdc6@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r111f1ce28b133a8090ca4f809a1bdf18a777426fc058dc3a16c39c66@%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r0841b06b48324cfc81325de3c05a92e53f997185f9d71ff47734d961@%3Cissues.solr.apache.org%3E
- https://github.com/eclipse/jetty.project
- http://packetstormsecurity.com/files/164590/Jetty-9.4.37.v20210219-Information-Disclosure.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-200, CWE-551, CWE-863- Platform
- Java / Kotlin (Maven)
- Package
org.eclipse.jetty:jetty-webapp- Disclosed
- 06.04.2021
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v7ff-8wcx-gmc5 - CC BY 4.0
Vulnerability history: org.eclipse.jetty:jetty-webapp
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 11.2020 07.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 2
Disclosures per year
- 2020: 1
- 2021: 2
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
Authorization Before Parsing and Canonicalization in jetty this entry
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