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Fencer Vulns
high 7.5

CVE-2018-8034 in the critical feed json

The host name verification missing in Apache Tomcat

published 2018-08-01 8 y ago modified 2026-06-17 4 mo ago also GHSA-46j3-r4pj-4835 , EUVD-2018-0496

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
21.0%
EPSS 21.0% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88.

Patch / fix

  • maven org.apache.tomcat.embed:tomcat-embed-core 7.0.90, 8.0.53, 8.5.32, 9.0.10
  • tomcat7 Ubuntu 14.04 LTS 7.0.52-1ubuntu0.15
  • tomcat8 Ubuntu 16.04 LTS 8.0.32-1ubuntu1.7
  • tomcat8 Ubuntu 18.04 LTS 8.5.39-1ubuntu1~18.04.1

ubuntu advisories UBUNTU-CVE-2018-8034

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xsom RHEL 8 0-19.20110809svn.module+el8.0.0+3248+9d514f3b
  • slf4j RHEL 8 1.7.25-4.module+el8.0.0+3248+9d514f3b
  • stax-ex RHEL 8 1.7.7-8.module+el8.0.0+3248+9d514f3b
  • bea-stax RHEL 8 1.2.0-16.module+el8.0.0+3248+9d514f3b
  • resteasy RHEL 8 3.0.26-3.module+el8.0.0+3248+9d514f3b
  • velocity RHEL 8 1.7-24.module+el8.0.0+3248+9d514f3b
  • xalan-j2 RHEL 8 2.7.1-38.module+el8.0.0+3248+9d514f3b
  • javassist RHEL 8 3.18.1-8.module+el8.0.0+3248+9d514f3b

red hat advisories RHSA-2019:1529RHSA-2019:2205RHSA-2019:1161RHSA-2019:1160RHSA-2019:1159RHSA-2019:0131

  • tomcat SLE Module for Web and Scripting 15 9.0.10-3.7.1
  • tomcat SLES for SAP 12 SP3, SLES 12 SP3 8.0.53-29.13.1
  • tomcat SLES for SAP 12 SP1, SLES 12 SP1-LTSS 8.0.53-10.35.1
  • tomcat SLES 12-LTSS 7.0.90-7.23.1

suse advisories SUSE-SU-2018:3011-1SUSE-SU-2018:3388-1SUSE-SU-2018:3261-1SUSE-SU-2018:2699-1

  • tomcat openSUSE Tumbleweed 9.0.36-8.4
  • tomcat10 openSUSE Tumbleweed 10.1.14-1.1

opensuse advisories openSUSE-SU-2024:11468-1openSUSE-SU-2024:13441-1

  • xsom AlmaLinux 8 0-19.20110809svn.module_el8.5.0+150+5f0dbea0
  • xsom AlmaLinux 8 0-19.20110809svn.module_el8.5.0+2577+9e95fe00
  • slf4j AlmaLinux 8 1.7.25-4.module_el8.6.0+2752+f1f3449e
  • slf4j AlmaLinux 8 1.7.25-4.module_el8.5.0+2577+9e95fe00
  • stax-ex AlmaLinux 8 1.7.7-8.module_el8.5.0+150+5f0dbea0
  • stax-ex AlmaLinux 8 1.7.7-8.module_el8.5.0+2577+9e95fe00
  • velocity AlmaLinux 8 1.7-24.module_el8.5.0+150+5f0dbea0
  • velocity AlmaLinux 8 1.7-24.module_el8.5.0+2577+9e95fe00

almalinux advisories ALSA-2019:1529

  • xsom Rocky Linux 8 0-19.20110809svn.module+el8.3.0+53+ea062990
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.5.0+697+f586bb30
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.3.0+74+855e3f5d
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.3.0+133+b8b54b58
  • stax-ex Rocky Linux 8 1.7.7-8.module+el8.3.0+53+ea062990
  • bea-stax Rocky Linux 8 1.2.0-16.module+el8.3.0+53+ea062990
  • resteasy Rocky Linux 8 3.0.26-3.module+el8.3.0+53+ea062990
  • velocity Rocky Linux 8 1.7-24.module+el8.3.0+53+ea062990

rocky linux advisories RLSA-2019:1529

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-2018-8034 updated cvss 4.3

tomcat: Host name verification missing in WebSocket client

  • Red Hat JBoss Data Virtualization 6 jbossweb jbossweb Red Hat JBoss Enterprise Web Server 2 tomcat7 tomcat7 Red Hat JBoss Fuse 6 tomcat Red Hat JBoss Fuse Service Works 6 jbossweb jbossweb Red Hat JBoss Operations Network 3 jbossweb jbossweb
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Application Runtimes tomcat
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 8) slf4j 1.7.25-4.module+el8.0.0+3248+9d514f3b, stax-ex 1.7.7-8.module+el8.0.0+3248+9d514f3b, velocity 1.7-24.module+el8.0.0+3248+9d514f3b, bea-stax 1.2.0-16.module+el8.0.0+3248+9d514f3b, resteasy 3.0.26-3.module+el8.0.0+3248+9d514f3b, xalan-j2 2.7.1-38.module+el8.0.0+3248+9d514f3b, +29 more
    fixed: vendor fix RHSA-2019:1529
  • Red Hat Enterprise Linux Client (v. 7) tomcat 7.0.76-9.el7, tomcat-servlet-3.0-api 7.0.76-9.el7 Red Hat Enterprise Linux Client Optional (v. 7) tomcat 7.0.76-9.el7, tomcat-lib 7.0.76-9.el7, tomcat-jsvc 7.0.76-9.el7, tomcat-javadoc 7.0.76-9.el7, tomcat-webapps 7.0.76-9.el7, tomcat-el-2.2-api 7.0.76-9.el7, +3 more Red Hat Enterprise Linux ComputeNode (v. 7) tomcat 7.0.76-9.el7, tomcat-servlet-3.0-api 7.0.76-9.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) tomcat 7.0.76-9.el7, tomcat-lib 7.0.76-9.el7, tomcat-jsvc 7.0.76-9.el7, tomcat-javadoc 7.0.76-9.el7, tomcat-webapps 7.0.76-9.el7, tomcat-el-2.2-api 7.0.76-9.el7, +3 more Red Hat Enterprise Linux Server (v. 7) tomcat 7.0.76-9.el7, tomcat-lib 7.0.76-9.el7, tomcat-webapps 7.0.76-9.el7, tomcat-el-2.2-api 7.0.76-9.el7, tomcat-jsp-2.2-api 7.0.76-9.el7, tomcat-admin-webapps 7.0.76-9.el7, +1 more Red Hat Enterprise Linux Server Optional (v. 7) tomcat 7.0.76-9.el7, tomcat-lib 7.0.76-9.el7, tomcat-jsvc 7.0.76-9.el7, tomcat-javadoc 7.0.76-9.el7, tomcat-webapps 7.0.76-9.el7, tomcat-el-2.2-api 7.0.76-9.el7, +3 more
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) tomcat 7.0.76-9.el7, tomcat-lib 7.0.76-9.el7, tomcat-webapps 7.0.76-9.el7, tomcat-el-2.2-api 7.0.76-9.el7, tomcat-jsp-2.2-api 7.0.76-9.el7, tomcat-admin-webapps 7.0.76-9.el7, +1 more Red Hat Enterprise Linux Workstation Optional (v. 7) tomcat-jsvc 7.0.76-9.el7, tomcat-javadoc 7.0.76-9.el7, tomcat-docs-webapp 7.0.76-9.el7
    fixed: vendor fix RHSA-2019:2205
  • Red Hat Fuse 7.5.0
    fixed: vendor fix RHSA-2019:3892
  • Red Hat JBoss Enterprise Application Platform 6.4
    fixed: vendor fix RHSA-2019:1162
  • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 5 Server dom4j-eap6 1.6.1-22.redhat_9.1.ep6.el5, hornetq 2.3.25-28.SP29_redhat_1.1.ep6.el5, apache-cxf 2.7.18-8.SP7_redhat_1.1.ep6.el5, jbossweb 7.5.30-1.Final_redhat_1.1.ep6.el5, resteasy 2.3.23-1.Final_redhat_1.1.ep6.el5, jboss-hal 2.5.19-1.Final_redhat_1.1.ep6.el5, +75 more
    fixed: vendor fix RHSA-2019:1159
  • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6 Server dom4j-eap6 1.6.1-22.redhat_9.1.ep6.el6, hornetq 2.3.25-28.SP29_redhat_1.1.ep6.el6, apache-cxf 2.7.18-8.SP7_redhat_1.1.ep6.el6, jbossweb 7.5.30-1.Final_redhat_1.1.ep6.el6, resteasy 2.3.23-1.Final_redhat_1.1.ep6.el6, jboss-hal 2.5.19-1.Final_redhat_1.1.ep6.el6, +75 more
    fixed: vendor fix RHSA-2019:1160
show 6 more
  • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7 Server dom4j-eap6 1.6.1-22.redhat_9.1.ep6.el7, hornetq 2.3.25-28.SP29_redhat_1.1.ep6.el7, apache-cxf 2.7.18-8.SP7_redhat_1.1.ep6.el7, jbossweb 7.5.30-1.Final_redhat_1.1.ep6.el7, resteasy 2.3.23-1.Final_redhat_1.1.ep6.el7, jboss-hal 2.5.19-1.Final_redhat_1.1.ep6.el7, +75 more
    fixed: vendor fix RHSA-2019:1161
  • Red Hat JBoss Web Server 3.1
    fixed: vendor fix RHSA-2019:0130
  • Red Hat JBoss Web Server 3.1 for RHEL 6 tomcat7 7.0.70-31.ep7.el6, tomcat8 8.0.36-35.ep7.el6, tomcat7-lib 7.0.70-31.ep7.el6, tomcat8-lib 8.0.36-35.ep7.el6, tomcat7-jsvc 7.0.70-31.ep7.el6, tomcat8-jsvc 8.0.36-35.ep7.el6, +19 more Red Hat JBoss Web Server 3.1 for RHEL 7 tomcat7 7.0.70-31.ep7.el7, tomcat8 8.0.36-35.ep7.el7, tomcat7-lib 7.0.70-31.ep7.el7, tomcat8-lib 8.0.36-35.ep7.el7, tomcat7-jsvc 7.0.70-31.ep7.el7, tomcat8-jsvc 8.0.36-35.ep7.el7, +19 more
    fixed: vendor fix RHSA-2019:0131
  • Red Hat JBoss Web Server 5.0
    fixed: vendor fix RHSA-2019:0450
  • Red Hat JBoss Web Server 5.0 for RHEL 6 Server jws5-ecj 4.6.1-6.redhat_1.1.el6jws, jws5-tomcat 9.0.7-17.redhat_16.1.el6jws, jws5-tomcat-lib 9.0.7-17.redhat_16.1.el6jws, jws5-javapackages-tools 3.4.1-5.15.10.el6jws, jws5-tomcat-jsvc 9.0.7-17.redhat_16.1.el6jws, jws5-python-javapackages 3.4.1-5.15.10.el6jws, +14 more Red Hat JBoss Web Server 5.0 for RHEL 7 Server jws5-ecj 4.6.1-6.redhat_1.1.el7jws, jws5-tomcat 9.0.7-17.redhat_16.1.el7jws, jws5-tomcat-lib 9.0.7-17.redhat_16.1.el7jws, jws5-javapackages-tools 3.4.1-5.15.10.el7jws, jws5-tomcat-jsvc 9.0.7-17.redhat_16.1.el7jws, jws5-python-javapackages 3.4.1-5.15.10.el7jws, +14 more
    fixed: vendor fix RHSA-2019:0451
  • Red Hat BPM Suite 6 tomcat Red Hat Enterprise Linux 6 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat6-el-2.1-api, +4 more Red Hat JBoss BRMS 5 jbossweb jbossweb Red Hat JBoss BRMS 6 tomcat Red Hat JBoss Data Grid 6 jbossweb jbossweb Red Hat JBoss Data Grid 7 tomcat
    +4 more products
    Red Hat JBoss Enterprise Application Platform 5 jbossweb jbossweb Red Hat JBoss Enterprise Web Server 2 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat6-el-1.0-api, +5 more Red Hat JBoss SOA Platform 5 jbossweb jbossweb Red Hat Software Collections rh-java-common-tomcat-lib, rh-java-common-tomcat-javadoc, rh-java-common-tomcat-el-2.2-api, rh-java-common-tomcat-jsp-2.2-api, rh-java-common-tomcat-servlet-3.0-api
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

21.05% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.tomcat.embed:tomcat-embed-core
>=9.0.0, <9.0.10
>=8.5.0, <8.5.32
>=8.0.0, <8.0.53
>=7.0.35, <7.0.90
9.0.10
8.5.32
8.0.53
7.0.90

Affected products

  • Apache Software Foundation Apache Tomcat

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns 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.