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Fencer Vulns
high 7.5

CVE-2021-4213 json

A flaw was found in JSS, where it did not properly free up all memory.

published 2022-08-24 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-34071

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

A flaw was found in JSS, where it did not properly free up all memory. Over time, the wasted memory builds up in the server memory, saturating the server’s RAM. This flaw allows an attacker to force the invocation of an out-of-memory process, causing a denial of service.

Patch / fix

  • dogtagpki network_security_services_for_java 4.9.3, 5.1.0
  • jss Debian 14, Debian 12 5.2.0-1

debian advisories DEBIAN-CVE-2021-4213

  • jss certificate system 10.4 4.9.8-1.module+el8pki+19895+c800dfbd
  • redhat-pki certificate system 10.4 10.13.9-5.module+el8pki+21062+4ed906e8
  • jss RHEL 8 4.9.3-1.module+el8.6.0+14244+60d461b7
  • pki-ca RHEL 8 10.12.0-2.module+el8.6.0+14115+8b467244
  • ldapjdk RHEL 8 4.23.0-1.module+el8.5.0+11983+6ba118b4
  • pki-kra RHEL 8 10.12.0-2.module+el8.6.0+14115+8b467244
  • pki-acme RHEL 8 10.12.0-2.module+el8.6.0+14115+8b467244
  • pki-base RHEL 8 10.12.0-2.module+el8.6.0+14115+8b467244

red hat advisories RHSA-2024:0774RHSA-2022:1851

  • jss AlmaLinux 8 4.9.3-1.module_el8.6.0+2764+9fc58d50
  • pki-ca AlmaLinux 8 10.12.0-2.module_el8.6.0+2764+9fc58d50
  • ldapjdk AlmaLinux 8 4.23.0-1.module_el8.6.0+2764+9fc58d50
  • pki-kra AlmaLinux 8 10.12.0-2.module_el8.6.0+2764+9fc58d50
  • pki-acme AlmaLinux 8 10.12.0-2.module_el8.6.0+2764+9fc58d50
  • pki-base AlmaLinux 8 10.12.0-2.module_el8.6.0+2764+9fc58d50
  • pki-tools AlmaLinux 8 10.12.0-2.module_el8.6.0+2764+9fc58d50
  • tomcatjss AlmaLinux 8 7.7.1-1.module_el8.6.0+2764+9fc58d50

almalinux advisories ALSA-2022:1851

  • jss Rocky Linux 8 4.9.3-1.module+el8.6.0+788+76246f77
  • ldapjdk Rocky Linux 8 4.23.0-1.module+el8.7.0+1069+6f3de942
  • ldapjdk Rocky Linux 8 4.23.0-1.module+el8.5.0+701+8dc610e5
  • pki-core Rocky Linux 8 10.12.0-2.module+el8.6.0+788+76246f77
  • tomcatjss Rocky Linux 8 7.7.1-1.module+el8.6.0+788+76246f77

rocky linux advisories RLSA-2022:1851

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-4213 updated cvss 7.5

JSS: memory leak in TLS connection leads to OOM

  • Red Hat Certificate System 10.4 for RHEL 8 jss 4.9.8-1.module+el8pki+19895+c800dfbd, redhat-pki 10.13.9-5.module+el8pki+21062+4ed906e8
    fixed: vendor fix RHSA-2024:0774
  • Red Hat Enterprise Linux AppStream (v. 8) jss 4.9.3-1.module+el8.6.0+14244+60d461b7, ldapjdk 4.23.0-1.module+el8.5.0+11983+6ba118b4, pki-ca 10.12.0-2.module+el8.6.0+14115+8b467244, pki-kra 10.12.0-2.module+el8.6.0+14115+8b467244, tomcatjss 7.7.1-1.module+el8.6.0+13291+248751b1, pki-acme 10.12.0-2.module+el8.6.0+14115+8b467244, +9 more
    fixed: vendor fix RHSA-2022:1851
  • Red Hat Certificate System 10.4 for RHEL 8 ldapjdk 4.23.0-1.module+el8pki+14677+1ef79a68, tomcatjss 7.7.3-1.module+el8pki+19895+c800dfbd, jss-javadoc 4.9.8-1.module+el8pki+19895+c800dfbd, redhat-pki 10.13.9-5.module+el8pki+21062+4ed906e8, redhat-pki-ca 10.13.9-5.module+el8pki+21062+4ed906e8, ldapjdk-javadoc 4.23.0-1.module+el8pki+14677+1ef79a68, +17 more Red Hat Enterprise Linux 6 jss, jss-javadoc Red Hat Enterprise Linux 7 jss, jss-javadoc Red Hat Enterprise Linux 9 jss, idm-jss
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.74% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • n/a JSS

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.