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Fencer Intel
high 7.4

CVE-2018-8020 json

Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are li…

published 2018-07-31 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19721

cvss
7.4
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.2%
EPSS 4.2% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.

Patch / fix

  • tomcat-native Debian 14, Debian 13, Debian 12 1.2.17-1

debian advisories DEBIAN-CVE-2018-8020

  • tomcat7 jboss enterprise web server 3.1 7.0.70-27.ep7.el6
  • tomcat7 jboss enterprise web server 3.1 7.0.70-27.ep7.el7
  • tomcat8 jboss enterprise web server 3.1 8.0.36-31.ep7.el6
  • tomcat8 jboss enterprise web server 3.1 8.0.36-31.ep7.el7
  • tomcat7-lib jboss enterprise web server 3.1 7.0.70-27.ep7.el6
  • tomcat7-lib jboss enterprise web server 3.1 7.0.70-27.ep7.el7
  • tomcat8-lib jboss enterprise web server 3.1 8.0.36-31.ep7.el6
  • tomcat8-lib jboss enterprise web server 3.1 8.0.36-31.ep7.el7

red hat advisories RHSA-2018:2469

  • libtcnative-1-0 SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 1.3.4-12.5.5.2

suse advisories SUSE-SU-2019:14014-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-8020 updated cvss 7.1

tomcat-native: Mishandled OCSP responses can allow clients to authenticate with revoked certificates

  • Red Hat JBoss Enterprise Web Server 2 tomcat-native tomcat-native
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Web Server 3.1
    fixed: vendor fix RHSA-2018:2470
  • Red Hat JBoss Web Server 3.1 for RHEL 6 tomcat7 7.0.70-27.ep7.el6, tomcat8 8.0.36-31.ep7.el6, tomcat7-lib 7.0.70-27.ep7.el6, tomcat8-lib 8.0.36-31.ep7.el6, tomcat7-jsvc 7.0.70-27.ep7.el6, tomcat8-jsvc 8.0.36-31.ep7.el6, +19 more Red Hat JBoss Web Server 3.1 for RHEL 7 tomcat7 7.0.70-27.ep7.el7, tomcat8 8.0.36-31.ep7.el7, tomcat7-lib 7.0.70-27.ep7.el7, tomcat8-lib 8.0.36-31.ep7.el7, tomcat7-jsvc 7.0.70-27.ep7.el7, tomcat8-jsvc 8.0.36-31.ep7.el7, +19 more
    fixed: vendor fix RHSA-2018:2469
  • Red Hat JBoss Enterprise Application Platform 5 tomcat-native tomcat-native Red Hat JBoss Enterprise Application Platform 6 tomcat-native tomcat-native
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.18% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.4 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Apache Software Foundation Apache Tomcat Native

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.