A flaw was found in mod_auth_openidc before version 2.4.1.
Priority LOW 31CWE-601Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-601.
Summary
A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a slash and backslash at the beginning.
Why it matters now
EPSS 0.01893 79th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:* | before 2.4.1 | Vulnerable | OpenIDC |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
- cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:* Versions before 2.4.1 Vulnerable ·OpenIDC
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
Remediation
Red Hat 2 advisories
- RHSA-2020:3970 Released 2020-09-29 · Red Hat rating Lowmod_auth_openidc security update
- Red Hat Enterprise Linux Server (v. 7) mod_auth_openidc-1.8.8-7.el7
- Red Hat Enterprise Linux Workstation (v. 7) mod_auth_openidc-1.8.8-7.el7
- RHSA-2020:3032 Released 2020-07-21 · Red Hat rating Moderatemod_auth_openidc:2.3 security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) cjose-0.6.1-2.module+el8+2454+f890a43a.aarch64::mod_auth_openidc:2.3, cjose-0.6.1-2.module+el8+2454+f890a43a.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-2.module+el8+2454+f890a43a.s390x::mod_auth_openidc:2.3 +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:3032 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:3970 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:3970 |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-20479
- 2026-10-03 Alias added: GHSA-5fmg-x3vm-cm8v
References
Patch 2
Advisory 5
Sources
- CVE-2019-20479 · CVE Program
- CVE-2019-20479 · NVD
- FIRST EPSS
- GHSA-5fmg-x3vm-cm8v · GitHub Advisory Database · CC BY 4.0
- CVE-2019-20479 · Red Hat security data · CC BY 4.0
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