CVE-2003-0866 json
Apache Tomcat Denial of Service vulnerability in the Catalina package
published 2003-10-17 23 y ago modified 2026-06-16 4 mo ago also GHSA-7wj2-48c4-2684 , EUVD-2022-1670
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 34.8%
- EPSS 34.8% chance of exploitation in 30 days, percentile 98%
- public exploits
- 1
- Exploit-DB
Summary
The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.
Patch / fix
- maven org.apache.tomcat:tomcat 4.1.0
- debian.org/security/2003/dsa-395 advisory
- securityfocus.com/bid/8824 advisory
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506 advisory
Timeline
- First public exploit (EDB-23245)
- Published
Exploit prediction
34.82% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-23245 Apache Tomcat 4.0.x - Non-HTTP Request Denial of Service dos, 2003-10-15
- bugs.debian.org http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.tomcat:tomcat | >=4.0, <4.1.0 |
4.1.0 |
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
debian.org
/security/2003/dsa-395
vendor-advisory, web, patch
-
securityfocus.com
/bid/8824
vdb-entry, web, patch, vendor-advisory
-
bugs.debian.org
/cgi-bin/bugreport.cgi?bug=215506
web, exploit, patch, vendor-advisory
-
sunsolve.sun.com
/search/document.do?assetkey=1-26-239312-1
vendor-advisory, web
-
tomcat.apache.org
/security-4.html
web
-
secunia.com
/advisories/30908
third-party-advisory, web
-
secunia.com
/advisories/30899
third-party-advisory, web
-
vupen.com
/english/advisories/2008/1979/references
vdb-entry, web
-
exchange.xforce.ibmcloud.com
/vulnerabilities/13429
vdb-entry, web
-
lists.apache.org
/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5%40%3Cdev.tomcat.apache.org%3E
mailing-list
-
lists.apache.org
/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74%40%3Cdev.tomcat.apache.org%3E
mailing-list
-
lists.apache.org
/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3%40%3Cdev.tomcat.apache.org%3E
mailing-list
-
nvd.nist.gov
/vuln/detail/CVE-2003-0866
advisory
-
lists.apache.org
/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5@%3Cdev.tomcat.apache.org%3E
web
-
lists.apache.org
/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74@%3Cdev.tomcat.apache.org%3E
web
-
lists.apache.org
/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3@%3Cdev.tomcat.apache.org%3E
web
Sources
- CVE List CVE-2003-0866
- GitHub Advisory GHSA-7wj2-48c4-2684
- NVD CVE-2003-0866
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.