# CVE-2019-3877: mod_auth_mellon: The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 feder...

CVE-2019-3877 is fixed in 3 products on 1 platform, first by libapache2-mod-auth-mellon 0.13.1-1ubuntu0.1, released March 21, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-3877
- Priority: Routine
- CVSS: 6.1 (Moderate)
- EPSS: 0.0212
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 21, 2019

## Description

The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions generated by an IdP server.  Security Fix(es):  * mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libapache2-mod-auth-mellon Ubuntu 18.04.6 LTS (bionic) | 0.13.1-1ubuntu0.1 | [libapache2-mod-auth-mellon 0.13.1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libapache2-mod-auth-mellon-0.13.1-1ubuntu0.1.md) | Mar 21, 2019 |
| Linux | libapache2-mod-auth-mellon Ubuntu 20.04 LTS (focal) | 0.14.2-1ubuntu1 | [libapache2-mod-auth-mellon 0.14.2-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libapache2-mod-auth-mellon-0.14.2-1ubuntu1.md) | Mar 21, 2019 |
| Linux | mod_auth_mellon RHEL 8 | 0:0.14.0-9.el8 | [RHSA-2019:3421](https://patchblox.com/security/data/fix/linux/rhsa-2019-3421.md) | Nov 5, 2019 |
| Linux | mod_auth_mellon ol 8 | 0:0.14.0-9.el8 | [ELSA-2019-3421](https://patchblox.com/security/data/fix/linux/elsa-2019-3421.md) | Nov 14, 2019 |
| Linux | mod_auth_mellon-diagnostics RHEL 8 | 0:0.14.0-9.el8 | [RHSA-2019:3421](https://patchblox.com/security/data/fix/linux/rhsa-2019-3421.md) | Nov 5, 2019 |
| Linux | mod_auth_mellon-diagnostics ol 8 | 0:0.14.0-9.el8 | [ELSA-2019-3421](https://patchblox.com/security/data/fix/linux/elsa-2019-3421.md) | Nov 14, 2019 |

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