Package Instance

Improper Access Control
A vulnerability in Tomcat leads to the exposure of resources to users that are not authorised to access them.

Apache Tomcat Vulnerable to Improper Neutralization of Escape, Meta, or Control Sequences
Tomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape sequences, it was possible for an attacker to use a specially crafted URL to inject ANSI escape sequences to manipulate the console and the clipboard and attempt to trick an administrator into running an attacker controlled command. While no attack vector was found, it may have been possible to mount this attack on other operating systems.



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.10, from 10.1.0-M1 through 10.1.44, from 9.0.40 through 9.0.108.

The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.60 though 8.5.100. Other, older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.11 or later, 10.1.45 or later or 9.0.109 or later, which fix the issue.

Information Exposure
While investigating bug it was discovered that Apache Tomcat to to to could re-use an HTTP request header value from the previous stream received on an `HTTP/2` connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the `HTTP/2` connection, it is possible that information could leak between requests.