A regression in the fix for bug 66512 in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SEND_HEADERS messare woudl be sent for the response which in turn meant that at least one AJP proxy (mod_proxy_ajp) would use the response headers from the previous request leading to an information leak.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tomcat | Apache | 8.5.88 (including) | 8.5.88 (including) |
| Tomcat | Apache | 9.0.74 (including) | 9.0.74 (including) |
| Tomcat | Apache | 10.1.8 (including) | 10.1.8 (including) |
| Tomcat | Apache | 11.0.0-milestone5 (including) | 11.0.0-milestone5 (including) |
| Tomcat6 | Ubuntu | trusty | * |
| Tomcat6 | Ubuntu | trusty/esm | * |
| Tomcat6 | Ubuntu | upstream | * |
| Tomcat6 | Ubuntu | xenial | * |
| Tomcat7 | Ubuntu | bionic | * |
| Tomcat7 | Ubuntu | trusty | * |
| Tomcat7 | Ubuntu | trusty/esm | * |
| Tomcat7 | Ubuntu | upstream | * |
| Tomcat7 | Ubuntu | xenial | * |
| Tomcat8 | Ubuntu | bionic | * |
| Tomcat8 | Ubuntu | upstream | * |
| Tomcat8 | Ubuntu | xenial | * |
| Tomcat9 | Ubuntu | bionic | * |
| Tomcat9 | Ubuntu | focal | * |
| Tomcat9 | Ubuntu | kinetic | * |
| Tomcat9 | Ubuntu | lunar | * |
| Tomcat9 | Ubuntu | mantic | * |
| Tomcat9 | Ubuntu | oracular | * |
| Tomcat9 | Ubuntu | upstream | * |