CVE catalog

CVE-2021-20718

libapache2-mod-auth-openidc: CVE-2021-20718

[CVE catalog]

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
3.40% · Oct 25, 2026

mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianlibapache2-mod-auth-openidcsid2.4.20.3-1fixed
Debianlibapache2-mod-auth-openidcforky2.4.20.3-1fixed
Debianlibapache2-mod-auth-openidctrixie2.4.17-1fixed
Debianlibapache2-mod-auth-openidctrixie-security2.4.17-1+deb13u1fixed
Debianlibapache2-mod-auth-openidcbookworm2.4.12.3-2+deb12u4fixed
Debianlibapache2-mod-auth-openidcbookworm-security2.4.12.3-2+deb12u5fixed
Suseapache2-mod_auth_openidcopenstack cloud 92.4.0-3.14.1fixed
Suseapache2-mod_auth_openidcopenstack cloud crowbar 92.4.0-3.14.1fixed
Suseapache2-mod_auth_openidclinux enterprise server for sap applications 12 sp42.4.0-3.14.1fixed
Suseapache2-mod_auth_openidclinux enterprise server 12 sp4-ltss2.4.0-3.14.1fixed
Suseapache2-mod_auth_openidclinux enterprise server 12 sp52.4.0-3.14.1fixed
Suseapache2-mod_auth_openidclinux enterprise server for sap applications 12 sp52.4.0-3.14.1fixed
Ubuntulibapache2-mod-auth-openidc20.042.3.10.2-1vulnerable
Ubuntulibapache2-mod-auth-openidc20.042.4.0.4-1vulnerable
Ubuntulibapache2-mod-auth-openidc20.042.4.1-1vulnerable

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianlibapache2-mod-auth-openidcsourcesid2.4.4.1-2not yet assignedNot reported[989055]
Debianlibapache2-mod-auth-openidcsourceforky2.4.4.1-2not yet assignedNot reported[989055]
Debianlibapache2-mod-auth-openidcsourcetrixie2.4.4.1-2not yet assignedNot reported[989055]
Debianlibapache2-mod-auth-openidcsourcebookworm2.4.4.1-2not yet assignedNot reported[989055]
Suseapache2-mod_auth_openidcrpmopenstack cloud 92.4.0-3.14.1Not reportedSUSE-SU-2021:1900-1Not reported
Suseapache2-mod_auth_openidcrpmopenstack cloud crowbar 92.4.0-3.14.1Not reportedSUSE-SU-2021:1900-1Not reported
Suseapache2-mod_auth_openidcrpmlinux enterprise server for sap applications 12 sp42.4.0-3.14.1Not reportedSUSE-SU-2021:1900-1Not reported
Suseapache2-mod_auth_openidcrpmlinux enterprise server 12 sp4-ltss2.4.0-3.14.1Not reportedSUSE-SU-2021:1900-1Not reported
Suseapache2-mod_auth_openidcrpmlinux enterprise server 12 sp52.4.0-3.14.1Not reportedSUSE-SU-2021:1900-1Not reported
Suseapache2-mod_auth_openidcrpmlinux enterprise server for sap applications 12 sp52.4.0-3.14.1Not reportedSUSE-SU-2021:1900-1Not reported

[Debian bug #989055]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [libapache2-mod-auth-openidc]Unknown
    Details (4)

    • 2.4.12.3-2+deb12u4 · amd64 · bookworm

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12

    • 2.4.12.3-2+deb12u4 · arm64 · bookworm

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12

    • 2.4.12.3-2+deb12u4 · amd64 · bookworm-security

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12

    • 2.4.12.3-2+deb12u4 · arm64 · bookworm-security

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12

[Debian 13 (Trixie)]

  • [libapache2-mod-auth-openidc]Unknown
    Details (3)

    • 2.4.17-1 · amd64 · trixie

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · 13

    • 2.4.17-1 · arm64 · trixie

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · 13

    • 2.4.17-1+deb13u1 · amd64 · trixie-security

      Fixed · Fixed: 2.4.4.1-2

      dsa · libapache2-mod-auth-openidc · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]