CVE-2019-3877

Description

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.

References

https://usn.ubuntu.com/3924-1/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/

https://github.com/Uninett/mod_auth_mellon/issues/35

https://github.com/Uninett/mod_auth_mellon/commit/62041428a32de402e0be6ba45fe12df6a83bedb8

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3877

https://access.redhat.com/errata/RHSA-2019:3421

https://access.redhat.com/errata/RHSA-2019:0766

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3