CVE-2019-3877
Medium
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.
SeverityMedium
CVSS5.8
Exploit probability—
Product
Mod Auth Mellon
PublishedMar 27, 2019
First seenMar 27, 2019
Weakness typeCWE-601Open redirect
How to fix
Update
- mod_auth_mellon_project mod_auth_mellon0.14.2 or later
Vendor advisories
- usn.ubuntu.com/3924-1/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/
- access.redhat.com/errata/RHSA-2019:0766
- access.redhat.com/errata/RHSA-2019:3421
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mod_auth_mellon_project mod_auth_mellon | v < 0.14.2 | 0.14.2 |
| fedoraproject fedora | 29 | — |
| redhat enterprise_linux | 7.0 | — |
| canonical ubuntu_linux | 18.04, 18.10 | — |
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