Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18, when the Java AJP connector and mod_jk load balancing are used, allows remote attackers to cause a denial of service (application outage) via a crafted request with invalid headers, related to temporary blocking of connectors that have encountered errors, as demonstrated by an error involving a malformed HTTP Host header.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| org.apache.tomcat:tomcat(Maven) | 4.1.0 | N/A | N/A |
| org.apache.tomcat:tomcat(Maven) | 5.5.0 | N/A | N/A |
| org.apache.tomcat:tomcat(Maven) | 6.0.0 | N/A | N/A |
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