Description
A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | mod_auth_mellon | Fixed in v0.18.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libapache2-mod-auth-mellon | 0.18.0-1 | — |
| Debian 13 | libapache2-mod-auth-mellon | 0.18.0-1 | — |
| Debian 12 | libapache2-mod-auth-mellon | 0.18.0-1 | — |
| Debian 10 | libapache2-mod-auth-mellon | 0.14.2-1+deb10u1 | DLA-3359-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | libapache2-mod-auth-mellon | 0.17.0-1ubuntu1 | — |
| Ubuntu 20.04 LTS | libapache2-mod-auth-mellon | 0.16.0-1ubuntu0.1 | USN-5069-1 |
| Ubuntu 18.04 LTS | libapache2-mod-auth-mellon | 0.13.1-1ubuntu0.3 | USN-5069-1 |
| Ubuntu 16.04 LTS | libapache2-mod-auth-mellon | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | mod_auth_mellon +1 | 0.14.0-12.el8.1 | RHSA-2022:1934 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | mod_auth_mellon +1 | 0.14.0-12.el8.1 | ALSA-2022:1934 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | mod_auth_mellon | 0.14.0-12.el8.1 | RLSA-2022:1934 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SLES 15 SP2 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SLES 12 SP5 | apache2-mod_auth_mellon | 0.16.0-8.6.1 | SUSE-SU-2021:2912-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP2 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SLES for SAP 12 SP5 | apache2-mod_auth_mellon | 0.16.0-8.6.1 | SUSE-SU-2021:2912-1 |
| SLE Real Time 15 SP2 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SLE HPC 15 SP2 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SUSE Manager Server 4.1 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SUSE Manager Retail Branch Server 4.1 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SUSE Manager Proxy 4.1 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| SUSE Enterprise Storage 7 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2-mod_auth_mellon | 0.19.0-1.1 | openSUSE-SU-2024:13848-1 |
| openSUSE Leap 15.4 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
| openSUSE Leap 15.3 | apache2-mod_auth_mellon | 0.17.0-150200.5.7.1 | SUSE-SU-2022:1524-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | mod_auth_mellon +1 | 0.14.0-9.amzn2.0.1 | ALAS2-2023-2077 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | mod_auth_mellon | 0.16.0-4 | — |
| Azure Linux 2 (CBL-Mariner) | mod_auth_mellon | 0.16.0-4 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | mod_auth_mellon +1 | 0.14.0-12.el8.1 | ELSA-2022-1934 |
Advisories 11
- ALSA-2022:1934 Moderate: mod_auth_mellon security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-5069-1 libapache2-mod-auth-mellon vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3359-1 libapache2-mod-auth-mellon - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:1934 Moderate: mod_auth_mellon security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:13848-1 apache2-mod_auth_mellon-0.19.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2912-1 Security update for apache2-mod_auth_mellon SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1524-1 Security update for apache2-mod_auth_mellon SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2022:1934 Red Hat Security Advisory: mod_auth_mellon security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2023-1389 Red Hat Enterprise Linux (mod_auth_mellon): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jun 8, 2023
- ALAS2-2023-2077 Moderate: mod_auth_mellon security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 7, 2023
- ELSA-2022-1934 Moderate: mod_auth_mellon security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 17, 2022