A vulnerability was found in mod_auth_mellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function.
Advisories
Source ID Title
Debian DSA Debian DSA DSA-4414-1 libapache2-mod-auth-mellon security update
EUVD EUVD EUVD-2019-13488 A vulnerability was found in mod_auth_mellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function.
Ubuntu USN Ubuntu USN USN-3924-1 mod_auth_mellon vulnerabilities
Ubuntu USN Ubuntu USN USN-4597-1 mod_auth_mellon vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00686}

epss

{'score': 0.00708}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-04T19:19:18.685Z

Reserved: 2019-01-03T00:00:00

Link: CVE-2019-3877

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-03-27T13:29:01.820

Modified: 2024-11-21T04:42:46.663

Link: CVE-2019-3877

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-03-22T00:00:00Z

Links: CVE-2019-3877 - Bugzilla

cve-icon OpenCVE Enrichment

No data.