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.
Remediation
References
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html
http://packetstormsecurity.com/files/163457/Apache-Tomcat-9.0.0.M1-Cross-Site-Scripting.html
http://seclists.org/fulldisclosure/2019/May/50
http://www.securityfocus.com/bid/108545
https://access.redhat.com/errata/RHSA-2019:3929
https://access.redhat.com/errata/RHSA-2019:3931
https://lists.apache.org/thread.html/6e6e9eacf7b28fd63d249711e9d3ccd4e0a83f556e324aee37be5a8c%40%3Cannounce.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.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.debian.org/debian-lts-announce/2019/05/msg00044.html
https://lists.debian.org/debian-lts-announce/2019/08/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NPHQEL5AQ6LZSZD2Y6TYZ4RC3WI7NXJ3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQTZ5BJ5F4KV6N53SGNKSW3UY5DBIQ46/
https://seclists.org/bugtraq/2019/Dec/43
https://security.gentoo.org/glsa/202003-43
https://security.netapp.com/advisory/ntap-20190606-0001/
https://support.f5.com/csp/article/K13184144?utm_source=f5support&%3Butm_medium=RSS
https://usn.ubuntu.com/4128-1/
https://usn.ubuntu.com/4128-2/
https://www.debian.org/security/2019/dsa-4596
https://www.oracle.com/security-alerts/cpuApr2021.html
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/security-alerts/cpujan2020.html
https://wwws.nightwatchcybersecurity.com/2019/05/27/xss-in-ssi-printenv-command-apache-tomcat-cve-2019-0221/
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