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Ubuntu Security Notice USN-6908-1
July 23, 2024

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Tomcat.

Software Description:
- tomcat7: Servlet 3.0 and JSP 2.2 Java API classes

Details:

It was discovered that the Tomcat 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 incorrectly handled certain uncommon
PersistenceManager with FileStore configurations. A remote attacker could
possibly use this issue to execute arbitrary code.
(CVE-2020-9484, CVE-2021-25329)

Update instructions:

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

Ubuntu 18.04 LTS
libservlet3.0-java 7.0.78-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libservlet3.0-java 7.0.68-1ubuntu0.4+esm2
Available with Ubuntu Pro
libtomcat7-java 7.0.68-1ubuntu0.4+esm2
Available with Ubuntu Pro
tomcat7 7.0.68-1ubuntu0.4+esm2
Available with Ubuntu Pro

Ubuntu 14.04 LTS
libservlet3.0-java 7.0.52-1ubuntu0.16+esm1
Available with Ubuntu Pro
libtomcat7-java 7.0.52-1ubuntu0.16+esm1
Available with Ubuntu Pro
tomcat7 7.0.52-1ubuntu0.16+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-6908-1
CVE-2019-0221, CVE-2020-9484, CVE-2021-25329