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Fencer Intel
medium 5.4

CVE-2018-1067 json

Improper Neutralization of CRLF Sequences in HTTP Headers in Undertow

published 2018-05-21 8 y ago modified 2026-06-17 4 mo ago also GHSA-47mp-rq2x-wjf2 , EUVD-2022-2327

cvss
5.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

In Undertow before versions 7.1.2.CR1, 7.1.2.GA it was found that the fix for CVE-2016-4993 was incomplete and Undertow web server is vulnerable to the injection of arbitrary HTTP headers, and also response splitting, due to insufficient sanitization and validation of user input before the input is used as part of an HTTP header value.

Patch / fix

  • maven org.jboss.eap:wildfly-undertow 7.1.2.GA
  • redhat undertow 1.4.25, 2.0.5
  • undertow Debian 14 1.4.25-1

debian advisories DEBIAN-CVE-2018-1067

  • rhvm-appliance RHEL 7 2:4.2-20180828.0.el7
  • eap7-jboss-ec2-eap jboss enterprise application platform 7 7.1.2-1.GA_redhat_1.ep7.el6
  • eap7-jboss-ec2-eap jboss enterprise application platform 7.1 7.1.2-1.GA_redhat_1.ep7.el7
  • eap7-jboss-ec2-eap-samples jboss enterprise application platform 7 7.1.2-1.GA_redhat_1.ep7.el6
  • eap7-jboss-ec2-eap-samples jboss enterprise application platform 7.1 7.1.2-1.GA_redhat_1.ep7.el7
  • eap7-jgroups jboss enterprise application platform 7.1 3.6.14-1.Final_redhat_1.1.ep7.el7
  • eap7-wildfly jboss enterprise application platform 7.1 7.1.2-1.GA_redhat_1.1.ep7.el7
  • eap7-undertow jboss enterprise application platform 7.1 1.4.18-5.SP5_redhat_1.1.ep7.el7

red hat advisories RHSA-2018:2643RHSA-2018:1249RHSA-2018:1247RHSA-2018:1248

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-2018-1067 updated cvss 5.4

undertow: HTTP header injection using CRLF with UTF-8 Encoding (incomplete fix of CVE-2016-4993)

  • Red Hat JBoss BRMS 5 jbossweb jbossweb Red Hat JBoss Fuse 6 jbossweb jbossweb Red Hat JBoss Fuse Service Works 6 jbossweb jbossweb Red Hat JBoss SOA Platform 5 jbossweb jbossweb
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Application Runtimes undertow undertow
    affected: no fix available
  • Red Hat JBoss EAP 7.1
    fixed: vendor fix RHSA-2018:1251
  • Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 Server eap7-wildfly 7.1.2-1.GA_redhat_1.1.ep7.el6, eap7-undertow 1.4.18-5.SP5_redhat_1.1.ep7.el6, eap7-jboss-ec2-eap 7.1.2-1.GA_redhat_1.ep7.el6, eap7-jgroups 3.6.14-1.Final_redhat_1.1.ep7.el6, eap7-picketbox 5.0.3-1.Final_redhat_1.1.ep7.el6, eap7-weld-core 2.4.7-1.Final_redhat_1.1.ep7.el6, +83 more
    fixed: vendor fix RHSA-2018:1248
  • Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 Server eap7-wildfly 7.1.2-1.GA_redhat_1.1.ep7.el7, eap7-undertow 1.4.18-5.SP5_redhat_1.1.ep7.el7, eap7-jboss-ec2-eap 7.1.2-1.GA_redhat_1.ep7.el7, eap7-jgroups 3.6.14-1.Final_redhat_1.1.ep7.el7, eap7-picketbox 5.0.3-1.Final_redhat_1.1.ep7.el7, eap7-weld-core 2.4.7-1.Final_redhat_1.1.ep7.el7, +83 more
    fixed: vendor fix RHSA-2018:1249
  • Red Hat JBoss Enterprise Application Platform Continuous Delivery
    fixed: vendor fix RHSA-2020:2562
  • Red Hat Virtualization 4 Hypervisor for RHEL 7 rhvm-appliance 4.2-20180828.0.el7 Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts rhvm-appliance 4.2-20180828.0.el7
    fixed: vendor fix RHSA-2018:2643
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2019:0877
show 1 more
  • Red Hat Enterprise Linux 5 tomcat5 Red Hat Enterprise Linux 6 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat6-el-2.1-api, +4 more Red Hat Enterprise Linux 7 tomcat, tomcat-lib, tomcat-jsvc, tomcat-javadoc, tomcat-webapps, tomcat-el-2.2-api, +4 more Red Hat Enterprise Linux 8 pki-deps:10.6/pki-servlet-container Red Hat JBoss Data Grid 6 jbossweb jbossweb Red Hat JBoss Data Grid 7 wildfly wildfly
    +7 more products
    Red Hat JBoss Enterprise Application Platform 5 jbossweb jbossweb Red Hat JBoss Enterprise Application Platform 6 jbossweb jbossweb Red Hat JBoss Enterprise Application Platform 7 wildfly wildfly Red Hat JBoss Enterprise Web Server 2 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat7 tomcat7, +6 more Red Hat Single Sign-On 7 wildfly wildfly 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 Red Hat Virtualization 4 eap7-wildfly
    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

1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.jboss.eap:wildfly-undertow
<7.1.2.GA
7.1.2.GA

Affected products

  • [UNKNOWN] undertow

Classification

Weakness
  • CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers

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.