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CVE-2021-4213

24
FAUCET Score

CVE-2021-4213 describes a memory leak vulnerability in JSS, affecting various Debian, Dogtag PKI, and Red Hat products utilizing Network Security Services for Java. This flaw allows an unauthenticated attacker to trigger an out-of-memory condition, leading to a denial of service. With a CVSS score of 7.5 (High), the attack is network-based and low complexity, requiring no user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.9.3CPE matchmatch criteria
cpe:2.3:a:dogtagpki:network_security_services_for_java:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.1.0CPE matchmatch criteria
cpe:2.3:a:dogtagpki:network_security_services_for_java:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux: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:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.20%
Probability of exploitation in next 30 days
EPSS Percentile
64.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0120 is in the 44th percentile among its peer group of 51,551 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 (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 10.4 for RHEL-8Fixed in: redhat-pki:10-8060020231220182310.07fb4edf
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: pki-core:10.6-8060020220215143656.7e0b02f6
View patch

Vendor Advisories (1)

redhatCVE-2021-4213Moderate

JSS: memory leak in TLS connection leads to OOM

Feb 9, 2022

References

access.redhat.com / security/cve/CVE-2021-4213
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / dogtagpki/jss/commit/3aabe0e9d59b0a42e68ac8cd0468f9c5179967d2
PatchThird Party Advisory
github.com / dogtagpki/jss/commit/5922560a78d0dee61af8a33cc9cfbf4cfa291448
PatchThird Party Advisory
security-tracker.debian.org / tracker/CVE-2021-4213
Third Party Advisory