Ubuntu Security Notice USN-4128-2


Ubuntu Security Notice USN-4128-2
September 18, 2019

tomcat9 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 19.04
– Ubuntu 18.04 LTS


Several security issues were fixed in Tomcat 9.

Software Description:
– tomcat9: Servlet and JSP engine


It was discovered that the Tomcat 9 SSI printenv command echoed user
provided data without escaping it. An attacker could possibly use this
issue to perform an XSS attack. (CVE-2019-0221)

It was discovered that Tomcat 9 did not address HTTP/2 connection window
exhaustion on write while addressing CVE-2019-0199. An attacker could
possibly use this issue to cause a denial of service. (CVE-2019-10072)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.04:
libtomcat9-java 9.0.16-3ubuntu0.19.04.1
tomcat9 9.0.16-3ubuntu0.19.04.1

Ubuntu 18.04 LTS:
libtomcat9-java 9.0.16-3ubuntu0.18.04.1
tomcat9 9.0.16-3ubuntu0.18.04.1

In general, a standard system update will make all the necessary changes.

CVE-2019-0221, CVE-2019-10072

Package Information: