CVE-2019-3877

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.

• CWE-601
• CWE-601

• https://access.redhat.com/errata/RHSA-2019:0766
• https://access.redhat.com/errata/RHSA-2019:3421
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3877Issue Tracking, Patch, Third Party Advisory
• https://github.com/Uninett/mod_auth_mellon/commit/62041428a32de402e0be6ba45fe12df6a83bedb8Patch, Third Party Advisory
• https://github.com/Uninett/mod_auth_mellon/issues/35Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/
• https://usn.ubuntu.com/3924-1/Third Party Advisory
• https://access.redhat.com/errata/RHSA-2019:0766
• https://access.redhat.com/errata/RHSA-2019:3421
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3877Issue Tracking, Patch, Third Party Advisory
• https://github.com/Uninett/mod_auth_mellon/commit/62041428a32de402e0be6ba45fe12df6a83bedb8Patch, Third Party Advisory
• https://github.com/Uninett/mod_auth_mellon/issues/35Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/
• https://usn.ubuntu.com/3924-1/Third Party Advisory

Published

Mar 27, 2019

Last Modified

Jun 17, 2026

Status

Modified

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