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CVE-2021-0341

24
FAUCET Score

CVE-2021-0341 is a high-severity vulnerability affecting Android versions 8.1 through 11, stemming from improper cryptographic usage in the OkHostnameVerifier.java component. This flaw allows an attacker to bypass hostname verification, potentially accepting a certificate for an incorrect domain. The vulnerability carries a CVSS score of 7.5, indicating a network-based attack with low complexity, requiring no user interaction or privileges, and leading to remote information disclosure. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage, suggesting a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
8.1CPE matchmatch criteria
cpe:2.3:o:google:android:8.1:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
0.88%
Probability of exploitation in next 30 days
EPSS Percentile
55.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0088 is in the 30th percentile among its peer group of 51,553 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 (17)

googlepatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.squareup.okhttp3:okhttpFixed in: 4.9.2
redhatpatch availablevia redhat_api
Product: Red Hat Data Grid 8.4.2Fixed in: okhttp
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform Expansion PackFixed in: okhttp
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/server-rhel8:3.16-14
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7Fixed in: okhttp
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.6 for RHEL 7Fixed in: rh-sso7-keycloak-0:18.0.7-1.redhat_00001.1.el7sso
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.6 for RHEL 9Fixed in: rh-sso7-keycloak-0:18.0.7-1.redhat_00001.1.el9sso
View patch
redhatpatch availablevia redhat_api
Product: RHEL-8 based Middleware ContainersFixed in: rh-sso-7/sso76-openshift-rhel8:7.6-22
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.6 for RHEL 8Fixed in: rh-sso7-keycloak-0:18.0.7-1.redhat_00001.1.el8sso
View patch
redhatpatch availablevia redhat_api
Product: Red Hat AMQ Streams 2.4.0Fixed in: okhttp
View patch
redhatno patchvia redhat_api
Product: Red Hat Integration Camel Quarkus 1Fixed in: okhttp
redhatno patchvia redhat_api
Product: Red Hat OpenShift Dev SpacesFixed in: devspaces/idea-rhel8
redhatend of lifevia redhat_api
Product: Red Hat Integration Camel K 1Fixed in: okhttp
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 7Fixed in: okhttp
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Application RuntimesFixed in: okhttp
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: jenkins-2-plugins

Vendor Advisories (2)

mavenGHSA-3cqm-mf7h-prrjhigh

Square OkHttp can accept the wrong certificate

May 24, 2022
redhatCVE-2021-0341Moderate

okhttp: information disclosure via improperly used cryptographic function

Feb 10, 2021

References

source.android.com / security/bulletin/2021-02-01
PatchVendor Advisory