CVE-2016-6808

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

9.8 CriticalFix available

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

22.7%Up 17.4 points since Feb 4, 2022

What each source reports

NVD Score used 9.8

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Record: CVE-2016-6808
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Record: CVE-2016-6808
Updated: 2026-11-02

EUVDEUVD-2016-7701 No score

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Record: EUVD-2016-7701
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jf5p-rxcp-5pm7 9.8

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

Record: GHSA-jf5p-rxcp-5pm7
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

OSVRHSA-2017:0193 8.1

Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Release on RHEL 6

Record: RHSA-2017:0193
CVSS 3.0: 8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2017:0194 8.1

Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Release on RHEL 7

Record: RHSA-2017:0194
CVSS 3.0: 8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

apache tomcat jk connector

Affected packages

Affected packages
Package	Affected	Fixed
`jbcs-httpd24-httpd` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-devel` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-manual` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-selinux` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-src-zip` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-tools` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-httpd-zip` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-mod_auth_kerb` Red Hat:jboss_core_services:1::el6	before 0:5.4-35.jbcs.el6	0:5.4-35.jbcs.el6
`jbcs-httpd24-mod_auth_kerb-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:5.4-35.jbcs.el6	0:5.4-35.jbcs.el6

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Affected packages
Package	Affected	Fixed
`jbcs-httpd24-mod_bmx` Red Hat:jboss_core_services:1::el6	before 0:0.9.6-14.GA.jbcs.el6	0:0.9.6-14.GA.jbcs.el6
`jbcs-httpd24-mod_bmx-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:0.9.6-14.GA.jbcs.el6	0:0.9.6-14.GA.jbcs.el6
`jbcs-httpd24-mod_bmx-src-zip` Red Hat:jboss_core_services:1::el6	before 0:0.9.6-14.GA.jbcs.el6	0:0.9.6-14.GA.jbcs.el6
`jbcs-httpd24-mod_cluster-native` Red Hat:jboss_core_services:1::el6	before 0:1.3.5-13.Final_redhat_1.jbcs.el6	0:1.3.5-13.Final_redhat_1.jbcs.el6
`jbcs-httpd24-mod_cluster-native-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:1.3.5-13.Final_redhat_1.jbcs.el6	0:1.3.5-13.Final_redhat_1.jbcs.el6
`jbcs-httpd24-mod_cluster-native-src-zip` Red Hat:jboss_core_services:1::el6	before 0:1.3.5-13.Final_redhat_1.jbcs.el6	0:1.3.5-13.Final_redhat_1.jbcs.el6
`jbcs-httpd24-mod_jk` Red Hat:jboss_core_services:1::el6	before 0:1.2.41-14.redhat_1.jbcs.el6	0:1.2.41-14.redhat_1.jbcs.el6
`jbcs-httpd24-mod_jk-ap24` Red Hat:jboss_core_services:1::el6	before 0:1.2.41-14.redhat_1.jbcs.el6	0:1.2.41-14.redhat_1.jbcs.el6
`jbcs-httpd24-mod_jk-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:1.2.41-14.redhat_1.jbcs.el6	0:1.2.41-14.redhat_1.jbcs.el6
`jbcs-httpd24-mod_jk-manual` Red Hat:jboss_core_services:1::el6	before 0:1.2.41-14.redhat_1.jbcs.el6	0:1.2.41-14.redhat_1.jbcs.el6
`jbcs-httpd24-mod_jk-src-zip` Red Hat:jboss_core_services:1::el6	before 0:1.2.41-14.redhat_1.jbcs.el6	0:1.2.41-14.redhat_1.jbcs.el6
`jbcs-httpd24-mod_ldap` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-mod_proxy_html` Red Hat:jboss_core_services:1::el6	before 1:2.4.23-102.jbcs.el6	1:2.4.23-102.jbcs.el6
`jbcs-httpd24-mod_rt` Red Hat:jboss_core_services:1::el6	before 0:2.4.1-16.GA.jbcs.el6	0:2.4.1-16.GA.jbcs.el6
`jbcs-httpd24-mod_rt-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:2.4.1-16.GA.jbcs.el6	0:2.4.1-16.GA.jbcs.el6
`jbcs-httpd24-mod_rt-src-zip` Red Hat:jboss_core_services:1::el6	before 0:2.4.1-16.GA.jbcs.el6	0:2.4.1-16.GA.jbcs.el6
`jbcs-httpd24-mod_security` Red Hat:jboss_core_services:1::el6	before 0:2.9.1-18.GA.jbcs.el6	0:2.9.1-18.GA.jbcs.el6
`jbcs-httpd24-mod_security-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:2.9.1-18.GA.jbcs.el6	0:2.9.1-18.GA.jbcs.el6
`jbcs-httpd24-mod_security-src-zip` Red Hat:jboss_core_services:1::el6	before 0:2.9.1-18.GA.jbcs.el6	0:2.9.1-18.GA.jbcs.el6
`jbcs-httpd24-mod_session` Red Hat:jboss_core_services:1::el6	before 0:2.4.23-102.jbcs.el6	0:2.4.23-102.jbcs.el6
`jbcs-httpd24-mod_ssl` Red Hat:jboss_core_services:1::el6	before 1:2.4.23-102.jbcs.el6	1:2.4.23-102.jbcs.el6
`jbcs-httpd24-nghttp2` Red Hat:jboss_core_services:1::el6	before 0:1.12.0-9.jbcs.el6	0:1.12.0-9.jbcs.el6
`jbcs-httpd24-nghttp2-debuginfo` Red Hat:jboss_core_services:1::el6	before 0:1.12.0-9.jbcs.el6	0:1.12.0-9.jbcs.el6
`jbcs-httpd24-openssl` Red Hat:jboss_core_services:1::el6	before 1:1.0.2h-12.jbcs.el6	1:1.0.2h-12.jbcs.el6
`jbcs-httpd24-openssl-debuginfo` Red Hat:jboss_core_services:1::el6	before 1:1.0.2h-12.jbcs.el6	1:1.0.2h-12.jbcs.el6
`jbcs-httpd24-openssl-devel` Red Hat:jboss_core_services:1::el6	before 1:1.0.2h-12.jbcs.el6	1:1.0.2h-12.jbcs.el6
`jbcs-httpd24-openssl-libs` Red Hat:jboss_core_services:1::el6	before 1:1.0.2h-12.jbcs.el6	1:1.0.2h-12.jbcs.el6
`jbcs-httpd24-openssl-perl` Red Hat:jboss_core_services:1::el6	before 1:1.0.2h-12.jbcs.el6	1:1.0.2h-12.jbcs.el6
`jbcs-httpd24-openssl-static` Red Hat:jboss_core_services:1::el6	before 1:1.0.2h-12.jbcs.el6	1:1.0.2h-12.jbcs.el6
`jbcs-httpd24-httpd` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-devel` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-manual` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-selinux` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-src-zip` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-tools` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-httpd-zip` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-mod_auth_kerb` Red Hat:jboss_core_services:1::el7	before 0:5.4-35.jbcs.el7	0:5.4-35.jbcs.el7
`jbcs-httpd24-mod_auth_kerb-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:5.4-35.jbcs.el7	0:5.4-35.jbcs.el7
`jbcs-httpd24-mod_bmx` Red Hat:jboss_core_services:1::el7	before 0:0.9.6-14.GA.jbcs.el7	0:0.9.6-14.GA.jbcs.el7
`jbcs-httpd24-mod_bmx-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:0.9.6-14.GA.jbcs.el7	0:0.9.6-14.GA.jbcs.el7
`jbcs-httpd24-mod_bmx-src-zip` Red Hat:jboss_core_services:1::el7	before 0:0.9.6-14.GA.jbcs.el7	0:0.9.6-14.GA.jbcs.el7
`jbcs-httpd24-mod_cluster-native` Red Hat:jboss_core_services:1::el7	before 0:1.3.5-13.Final_redhat_1.jbcs.el7	0:1.3.5-13.Final_redhat_1.jbcs.el7
`jbcs-httpd24-mod_cluster-native-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:1.3.5-13.Final_redhat_1.jbcs.el7	0:1.3.5-13.Final_redhat_1.jbcs.el7
`jbcs-httpd24-mod_jk` Red Hat:jboss_core_services:1::el7	before 0:1.2.41-14.redhat_1.jbcs.el7	0:1.2.41-14.redhat_1.jbcs.el7
`jbcs-httpd24-mod_jk-ap24` Red Hat:jboss_core_services:1::el7	before 0:1.2.41-14.redhat_1.jbcs.el7	0:1.2.41-14.redhat_1.jbcs.el7
`jbcs-httpd24-mod_jk-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:1.2.41-14.redhat_1.jbcs.el7	0:1.2.41-14.redhat_1.jbcs.el7
`jbcs-httpd24-mod_jk-manual` Red Hat:jboss_core_services:1::el7	before 0:1.2.41-14.redhat_1.jbcs.el7	0:1.2.41-14.redhat_1.jbcs.el7
`jbcs-httpd24-mod_ldap` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-mod_proxy_html` Red Hat:jboss_core_services:1::el7	before 1:2.4.23-102.jbcs.el7	1:2.4.23-102.jbcs.el7
`jbcs-httpd24-mod_rt` Red Hat:jboss_core_services:1::el7	before 0:2.4.1-16.GA.jbcs.el7	0:2.4.1-16.GA.jbcs.el7
`jbcs-httpd24-mod_rt-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:2.4.1-16.GA.jbcs.el7	0:2.4.1-16.GA.jbcs.el7
`jbcs-httpd24-mod_rt-src-zip` Red Hat:jboss_core_services:1::el7	before 0:2.4.1-16.GA.jbcs.el7	0:2.4.1-16.GA.jbcs.el7
`jbcs-httpd24-mod_security` Red Hat:jboss_core_services:1::el7	before 0:2.9.1-18.GA.jbcs.el7	0:2.9.1-18.GA.jbcs.el7
`jbcs-httpd24-mod_security-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:2.9.1-18.GA.jbcs.el7	0:2.9.1-18.GA.jbcs.el7
`jbcs-httpd24-mod_security-src-zip` Red Hat:jboss_core_services:1::el7	before 0:2.9.1-18.GA.jbcs.el7	0:2.9.1-18.GA.jbcs.el7
`jbcs-httpd24-mod_session` Red Hat:jboss_core_services:1::el7	before 0:2.4.23-102.jbcs.el7	0:2.4.23-102.jbcs.el7
`jbcs-httpd24-mod_ssl` Red Hat:jboss_core_services:1::el7	before 1:2.4.23-102.jbcs.el7	1:2.4.23-102.jbcs.el7
`jbcs-httpd24-nghttp2` Red Hat:jboss_core_services:1::el7	before 0:1.12.0-9.jbcs.el7	0:1.12.0-9.jbcs.el7
`jbcs-httpd24-nghttp2-debuginfo` Red Hat:jboss_core_services:1::el7	before 0:1.12.0-9.jbcs.el7	0:1.12.0-9.jbcs.el7
`jbcs-httpd24-openssl` Red Hat:jboss_core_services:1::el7	before 1:1.0.2h-12.jbcs.el7	1:1.0.2h-12.jbcs.el7
`jbcs-httpd24-openssl-debuginfo` Red Hat:jboss_core_services:1::el7	before 1:1.0.2h-12.jbcs.el7	1:1.0.2h-12.jbcs.el7
`jbcs-httpd24-openssl-devel` Red Hat:jboss_core_services:1::el7	before 1:1.0.2h-12.jbcs.el7	1:1.0.2h-12.jbcs.el7
`jbcs-httpd24-openssl-libs` Red Hat:jboss_core_services:1::el7	before 1:1.0.2h-12.jbcs.el7	1:1.0.2h-12.jbcs.el7
`jbcs-httpd24-openssl-perl` Red Hat:jboss_core_services:1::el7	before 1:1.0.2h-12.jbcs.el7	1:1.0.2h-12.jbcs.el7
`jbcs-httpd24-openssl-static` Red Hat:jboss_core_services:1::el7	before 1:1.0.2h-12.jbcs.el7	1:1.0.2h-12.jbcs.el7

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-6808 is a critical vulnerability (CVSS 9.8) in Apache Tomcat Jk Connector, published April 12, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 22.7%, the 97th percentile. Fixed in jbcs-httpd24-httpd 0:2.4.23-102.jbcs.el6.

References

Show 46 moreShow less