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CVE-2019-3878
A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured…
High8.1EPSS 3.0%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | High8.1 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Modified | 3.0 | High8.1 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.0% · top 13% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
Affected products
- affected before v0.14.2
References (9)
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/Uninett/mod_auth_mellon/pull/196 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-3924-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- FEDORA-2019-db1e9b3002 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2019-2d8ee47f61 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2019:0746 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:0766 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:0985 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHBA-2019:0959 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-3878)Record last updated .