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Fencer Vulns
high 7.5

CVE-2018-11759 in the critical feed json

The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK…

published 2018-10-31 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-3777

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
90.6%
EPSS 90.6% chance of exploitation in 30 days, percentile 99.8%
public exploits
0
none known, plus a Nuclei check

Summary

The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44 did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via httpd, then it was possible for a specially constructed request to expose application functionality through the reverse proxy that was not intended for clients accessing the application via the reverse proxy. It was also possible in some configurations for a specially constructed request to bypass the access controls configured in httpd. While there is some overlap between this issue and CVE-2018-1323, they are not identical.

Patch / fix

  • libapache-mod-jk Debian 14, Debian 13, Debian 12 1:1.2.46-1

debian advisories DEBIAN-CVE-2018-11759

  • jbcs-httpd24 jboss core services 1 1-6.jbcs.el6
  • jbcs-httpd24 jboss core services 1 1-6.jbcs.el7
  • jbcs-httpd24-apr jboss core services 1 1.6.3-31.jbcs.el6
  • jbcs-httpd24-apr jboss core services 1 1.6.3-31.jbcs.el7
  • jbcs-httpd24-httpd jboss core services 1 2.4.29-35.jbcs.el6
  • jbcs-httpd24-httpd jboss core services 1 2.4.29-35.jbcs.el7
  • jbcs-httpd24-mod_jk jboss core services 1 1.2.46-1.redhat_1.jbcs.el6
  • jbcs-httpd24-mod_jk jboss core services 1 1.2.46-1.redhat_1.jbcs.el7

red hat advisories RHSA-2019:0367

  • apache2-mod_jk SLE Module for Server Applications 15 SP5, SLE Module for Server Applications 15 SP4, openSUSE Leap 15.5 +1 more 1.2.49-150100.6.6.1
  • apache2-mod_jk SLES for SAP 12 SP4, SLES 12 SP4 1.2.40-7.3.1
  • apache2-mod_jk SLE Module for Server Applications 15 1.2.43-3.3.1
  • apache2-mod_jk SLES for SAP 11 SP4, SLES 11 SP4 1.2.40-0.2.5.1

suse advisories SUSE-SU-2023:4513-1SUSE-SU-2018:3963-2SUSE-SU-2018:3969-1SUSE-SU-2018:3970-1

  • apache2-mod_jk openSUSE Tumbleweed 1.2.48-2.9

opensuse advisories openSUSE-SU-2024:10625-1

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-2018-11759 updated cvss 7.5

mod_jk: connector path traversal due to mishandled HTTP requests in httpd

  • Red Hat JBoss Enterprise Application Platform 5 mod_jk mod_jk
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Application Platform 6 mod_jk mod_jk
    affected: no fix available
  • Red Hat JBoss Enterprise Web Server 2 mod_jk mod_jk
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2019:0366
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24 1-6.jbcs.el6, jbcs-httpd24-runtime 1-6.jbcs.el6, jbcs-httpd24-apr 1.6.3-31.jbcs.el6, jbcs-httpd24-httpd 2.4.29-35.jbcs.el6, jbcs-httpd24-nghttp2 1.29.0-9.jbcs.el6, jbcs-httpd24-apr-util 1.6.1-24.jbcs.el6, +22 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24 1-6.jbcs.el7, jbcs-httpd24-runtime 1-6.jbcs.el7, jbcs-httpd24-apr 1.6.3-31.jbcs.el7, jbcs-httpd24-httpd 2.4.29-35.jbcs.el7, jbcs-httpd24-nghttp2 1.29.0-9.jbcs.el7, jbcs-httpd24-apr-util 1.6.1-24.jbcs.el7, +22 more
    fixed: vendor fix RHSA-2019:0367
  • Red Hat JBoss Web Server 3 mod_jk mod_jk
    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

90.65% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Apache Tomcat JK Connect <=1.2.44 - Manager Access nuclei detection template

CVSS scores

assigned by version score vector
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

Affected products

  • Apache Software Foundation Apache Tomcat Connectors

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.