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CVE-2018-20102

26
FAUCET Score

CVE-2018-20102 is an out-of-bounds read vulnerability in HAProxy through version 1.8.14, affecting various Canonical, HAProxy, and Red Hat products. This flaw allows remote attackers to read 16 bytes of uninitialized buffer data, potentially exposing sensitive information from the stack or beyond the buffer. With a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with low attack complexity, leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.14CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
18.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
3.11CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.35%
Probability of exploitation in next 30 days
EPSS Percentile
90.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0435 is in the 83rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-enterprise-service-catalog-1:3.11.82-1.git.1673.133961e.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-0:3.11.82-1.git.0.08bc31b.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-cluster-autoscaler-0:3.11.82-1.git.0.efb6af0.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-descheduler-0:3.11.82-1.git.300.89765c9.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-dockerregistry-0:3.11.82-1.git.452.0ce6383.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-metrics-server-0:3.11.82-1.git.52.2fdca3f.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-node-problem-detector-0:3.11.82-1.git.254.a448936.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-service-idler-0:3.11.82-1.git.14.e353758.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-web-console-0:3.11.82-1.git.355.5e8b1d9.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-openshift-oauth-proxy-0:3.11.82-1.git.425.7cac034.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-prometheus-alertmanager-0:3.11.82-1.git.0.3bf41ce.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-prometheus-node_exporter-0:3.11.82-1.git.1063.48444e8.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-prometheus-prometheus-0:3.11.82-1.git.5027.9d24833.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: haproxy-0:1.8.17-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-0:2.150.2.1549032159-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-2-plugins-0:3.11.1549642489-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-ansible-0:3.11.82-3.git.0.9718d0a.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-enterprise-autoheal-0:3.11.82-1.git.219.0b5aff4.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-enterprise-cluster-capacity-0:3.11.82-1.git.380.cf11c51.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.9Fixed in: haproxy-0:1.8.17-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-haproxy18-haproxy-0:1.8.17-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-haproxy18-haproxy-0:1.8.17-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-haproxy18-haproxy-0:1.8.17-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-haproxy18-haproxy-0:1.8.17-1.el7
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 3.10Fixed in: haproxy
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 3.7Fixed in: haproxy

Vendor Advisories (1)

redhatCVE-2018-20102Moderate

haproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure

Dec 12, 2018

References

git.haproxy.org
access.redhat.com / errata/RHBA-2019:0326
Third Party Advisory
access.redhat.com / errata/RHBA-2019:0327
Third Party Advisory
access.redhat.com / errata/RHSA-2019:1436
lists.debian.org / debian-lts-announce/2022/05/msg00045.html
usn.ubuntu.com / 3858-1
Third Party Advisory
securityfocus.com / bid/106223
Third Party AdvisoryVDB Entry