mod_cluster: Protocol parsing logic error
Published Mar 9, 2018
4.3
MEDIUMCVSS 3.0
EPSS 4.44%
Description
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.
Affected products
-
- Version httpd 2.4.23StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Red Hat, Inc. | Mod Cluster | n/a |
|
Configuration 1
- < 2.4.23
Configuration 2
- 6.0
- 7.0
Configuration 3
- n/a
No data.
JBoss Core Services on RHEL 6
jbcs-httpd24-httpd-0:2.4.23-102.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_auth_kerb-0:5.4-35.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_bmx-0:0.9.6-14.GA.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_cluster-native-0:1.3.5-13.Final_redhat_1.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_jk-0:1.2.41-14.redhat_1.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_rt-0:2.4.1-16.GA.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_security-0:2.9.1-18.GA.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-nghttp2-0:1.12.0-9.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 6
jbcs-httpd24-openssl-1:1.0.2h-12.jbcs.el6
Fixed · RHSA-2017:0193
JBoss Core Services on RHEL 7
jbcs-httpd24-httpd-0:2.4.23-102.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_auth_kerb-0:5.4-35.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_bmx-0:0.9.6-14.GA.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_cluster-native-0:1.3.5-13.Final_redhat_1.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_jk-0:1.2.41-14.redhat_1.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_rt-0:2.4.1-16.GA.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_security-0:2.9.1-18.GA.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-nghttp2-0:1.12.0-9.jbcs.el7
Fixed · RHSA-2017:0194
JBoss Core Services on RHEL 7
jbcs-httpd24-openssl-1:1.0.2h-12.jbcs.el7
Fixed · RHSA-2017:0194
Red Hat JBoss Core Services
n/a
Fixed · RHSA-2016:2957
Red Hat JBoss Enterprise Application Platform 5
mod_cluster
Will not fix
Red Hat JBoss Enterprise Application Platform 6
mod_cluster
Will not fix
Red Hat JBoss Enterprise Application Platform 7
mod_cluster
Not affected
Red Hat JBoss Enterprise Web Server 2
mod_cluster
Will not fix
Red Hat JBoss Enterprise Web Server 3
mod_cluster
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| JBoss Core Services on RHEL 6 | jbcs-httpd24-httpd-0:2.4.23-102.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_auth_kerb-0:5.4-35.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_bmx-0:0.9.6-14.GA.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_cluster-native-0:1.3.5-13.Final_redhat_1.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_jk-0:1.2.41-14.redhat_1.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_rt-0:2.4.1-16.GA.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_security-0:2.9.1-18.GA.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-nghttp2-0:1.12.0-9.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-openssl-1:1.0.2h-12.jbcs.el6 | Fixed | RHSA-2017:0193 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-httpd-0:2.4.23-102.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_auth_kerb-0:5.4-35.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_bmx-0:0.9.6-14.GA.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_cluster-native-0:1.3.5-13.Final_redhat_1.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_jk-0:1.2.41-14.redhat_1.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_rt-0:2.4.1-16.GA.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_security-0:2.9.1-18.GA.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-nghttp2-0:1.12.0-9.jbcs.el7 | Fixed | RHSA-2017:0194 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-openssl-1:1.0.2h-12.jbcs.el7 | Fixed | RHSA-2017:0194 |
| Red Hat JBoss Core Services | n/a | Fixed | RHSA-2016:2957 |
| Red Hat JBoss Enterprise Application Platform 5 | mod_cluster | Will not fix | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | mod_cluster | Will not fix | n/a |
| Red Hat JBoss Enterprise Application Platform 7 | mod_cluster | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | mod_cluster | Will not fix | n/a |
| Red Hat JBoss Enterprise Web Server 3 | mod_cluster | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:A/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.44% (0.04442) | 91.09th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.69% (0.04692) | 90.59th | v5 (v2026.06.15) |
| Oct 4, 2025 | 1.56% (0.01557) | 80.82th | v4 (v2025.03.14) |
| Aug 1, 2025 | 0.54% (0.00544) | 66.91th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.56% (0.01557) | 80.19th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.11% (0.00114) | 46.68th | v3 (v2023.03.01) |
| Sep 9, 2023 | 0.11% (0.00114) | 44.43th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.14% (0.00140) | 47.85th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.74% (0.01742) | 76.22th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.74% (0.01742) | 75.70th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.86% (0.01859) | 76.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.74% (0.01742) | 74.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.74% (0.01742) | 53.37th | v2 (v2022.01.01) |
References (9)
- http://rhn.redhat.com/errata/RHSA-2016-2957.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/94939 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:0193 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0194 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-8612 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1387605 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-8612
- https://security.netapp.com/advisory/ntap-20180601-0005/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-8612
| Link | Providers | Tags |
|---|---|---|
| http://rhn.redhat.com/errata/RHSA-2016-2957.html | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| http://www.securityfocus.com/bid/94939 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/errata/RHSA-2017:0193 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2017:0194 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-8612 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1387605 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-8612 | ||
| https://security.netapp.com/advisory/ntap-20180601-0005/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2016-8612 |
Change history (0)
No recorded changes yet.