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Fencer Intel
medium 4.3

CVE-2016-8612 json

Apache HTTP Server mod_cluster before version httpd 2.4.23 is vulnerable to an Improper Input Validation in the protocol parsing logic in t…

published 2018-03-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9458

cvss
4.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Apache HTTP Server mod_cluster before version httpd 2.4.23 is vulnerable to an Improper Input Validation in the protocol parsing logic in the load balancer resulting in a Segmentation Fault in the serving httpd process.

Patch / fix

  • apache http_server 2.4.23
  • jbcs-httpd24-httpd jboss core services 1 2.4.23-102.jbcs.el7
  • jbcs-httpd24-mod_jk jboss core services 1 1.2.41-14.redhat_1.jbcs.el7
  • jbcs-httpd24-mod_rt jboss core services 1 2.4.1-16.GA.jbcs.el7
  • jbcs-httpd24-mod_bmx jboss core services 1 0.9.6-14.GA.jbcs.el7
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.23-102.jbcs.el7
  • jbcs-httpd24-nghttp2 jboss core services 1 1.12.0-9.jbcs.el7
  • jbcs-httpd24-openssl jboss core services 1 1:1.0.2h-12.jbcs.el7
  • jbcs-httpd24-mod_ldap jboss core services 1 2.4.23-102.jbcs.el7

red hat advisories RHSA-2017:0194RHSA-2017:0193

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-2016-8612 updated cvss 4.3

mod_cluster: Protocol parsing logic error

  • Red Hat JBoss Enterprise Application Platform 5 mod_cluster mod_cluster Red Hat JBoss Enterprise Application Platform 6 mod_cluster mod_cluster Red Hat JBoss Enterprise Web Server 2 mod_cluster mod_cluster
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Web Server 3 mod_cluster mod_cluster
    affected: no fix available
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2016:2957
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-httpd 2.4.23-102.jbcs.el6, jbcs-httpd24-nghttp2 1.12.0-9.jbcs.el6, jbcs-httpd24-openssl 1.0.2h-12.jbcs.el6, jbcs-httpd24-mod_rt 2.4.1-16.GA.jbcs.el6, jbcs-httpd24-mod_ssl 2.4.23-102.jbcs.el6, jbcs-httpd24-mod_bmx 0.9.6-14.GA.jbcs.el6, +21 more
    fixed: vendor fix RHSA-2017:0193
  • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd 2.4.23-102.jbcs.el7, jbcs-httpd24-nghttp2 1.12.0-9.jbcs.el7, jbcs-httpd24-openssl 1.0.2h-12.jbcs.el7, jbcs-httpd24-mod_rt 2.4.1-16.GA.jbcs.el7, jbcs-httpd24-mod_ssl 2.4.23-102.jbcs.el7, jbcs-httpd24-mod_bmx 0.9.6-14.GA.jbcs.el7, +19 more
    fixed: vendor fix RHSA-2017:0194
  • Red Hat JBoss Enterprise Application Platform 7 mod_cluster mod_cluster
    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

4.44% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 4.3 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 3.3 AV:A/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Red Hat, Inc. mod_cluster

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

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.