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CVE-2020-2102

16
FAUCET Score

CVE-2020-2102 affects Jenkins 2.218 and earlier, and LTS 2.204.1 and earlier, stemming from a non-constant time comparison function used during HMAC validation. This medium-severity vulnerability (CVSS 5.3) has a network attack vector and high attack complexity, potentially leading to high confidentiality impact without affecting integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.204.1CPE matchmatch criteria
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
<= 2.218CPE matchmatch criteria
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*
<= 2.218CPE match
cpe:2.3:a:jenkins:jenkins:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.38%
Probability of exploitation in next 30 days
EPSS Percentile
69.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0138 is in the 68th percentile among its peer group of 1,428 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (23)

mavenpatch availablevia ghsa
Product: org.jenkins-ci.main:jenkins-coreFixed in: 2.204.2
mavenpatch availablevia ghsa
Product: org.jenkins-ci.main:jenkins-coreFixed in: 2.219
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-enterprise-service-catalog-1:3.11.170-1.git.1.91db82e.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-0:3.11.170-1.git.0.00cac56.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-cluster-autoscaler-0:3.11.170-1.git.1.0a0df6a.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-descheduler-0:3.11.170-1.git.1.9ad83f2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-dockerregistry-0:3.11.170-1.git.1.55fab05.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-metrics-server-0:3.11.170-1.git.1.357f177.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-node-problem-detector-0:3.11.170-1.git.1.b1f90a6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-service-idler-0:3.11.170-1.git.1.8328979.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift-web-console-0:3.11.170-1.git.1.3d64e8b.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: cri-o-0:1.11.16-0.5.dev.rhaos3.11.git3f89eba.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-openshift-oauth-proxy-0:3.11.170-1.git.1.b49be83.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-prometheus-alertmanager-0:3.11.170-1.git.1.61d7960.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-prometheus-node_exporter-0:3.11.170-1.git.1.51473b7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: golang-github-prometheus-prometheus-0:3.11.170-1.git.1.227bc98.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-0:2.204.2.1580891656-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-2-plugins-0:3.11.1579107288-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-ansible-0:3.11.170-2.git.5.8802564.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-enterprise-autoheal-0:3.11.170-1.git.1.dfe6c52.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-enterprise-cluster-capacity-0:3.11.170-1.git.1.661684b.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift-kuryr-0:3.11.170-1.git.1.7265da1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.3Fixed in: jenkins-0:2.204.2.1583446818-1.el7
View patch

Vendor Advisories (2)

mavenGHSA-fj6f-6933-839jmedium

Non-constant time HMAC comparison

May 24, 2022
redhatCVE-2020-2102Moderate

jenkins: Non-constant time HMAC comparison

Jan 29, 2020

References

access.redhat.com / errata/RHBA-2020:0402
access.redhat.com / errata/RHBA-2020:0675
access.redhat.com / errata/RHSA-2020:0681
access.redhat.com / errata/RHSA-2020:0683
jenkins.io / security/advisory/2020-01-29
Vendor Advisory
openwall.com / lists/oss-security/2020/01/29/1
Mailing ListThird Party Advisory