CVE-2019-12418 — When Apache Tomcat 9
When Apache Tomcat 9.0.0.M1 to 9.0.28, 8.5.0 to 8.5.47, 7.0.0 and 7.0.97 is configured with the JMX Remote Lifecycle Listener, a local attacker without access to the Tomcat process or configuration files is able to manipulate the RMI registry to perform a man-in-the-middle attack
Published
2019-12-23T18:15:10.753
Last modified
2026-10-08T21:17:12.080
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
01What is this vulnerability?
When Apache Tomcat 9.0.0.M1 to 9.0.28, 8.5.0 to 8.5.47, 7.0.0 and 7.0.97 is configured with the JMX Remote Lifecycle Listener, a local attacker without access to the Tomcat process or configuration files is able to manipulate the RMI registry to perform a man-in-the-middle attack to capture user names and passwords used to access the JMX interface. The attacker can then use these credentials to…
02Affected products
No structured affected-product list available — see references below for vendor advisories.
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2019-12-23T18:15:10.753
- Last modified: 2026-10-08T21:17:12.080
09References
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html
- lists.apache.org — https://lists.apache.org/thread.html/43530b91506e2e0c11cfbe691173f5df8c48f51b982…
- lists.apache.org — https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa…
- lists.apache.org — https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453…
- lists.apache.org — https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f67412…
- lists.apache.org — https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a148555…
- lists.apache.org — https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d…
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/03/msg00029.html
- seclists.org — https://seclists.org/bugtraq/2019/Dec/43
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