Auth bypass in Spnego HTTP Authentication Module Project
CVE-2021-21335
In the SPNEGO HTTP Authentication Module for nginx (spnego-http-auth-nginx-module) before version 1.1.1 basic Authentication can be bypassed using a malformed username. This affects users of spnego-http-auth-nginx-module that have enabled basic authentication. This is fixed in version 1.1.1 of spnego-http-auth-nginx-module. As a workaround, one may disable basic authentication.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.017 (75.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/stnoonan/spnego-http-auth-nginx-module/security/advisories/GHSA-ww8q… (Patch, Third Party Advisory)
- github.com/stnoonan/spnego-http-auth-nginx-module/commit/a06f9efca373e25328b1c5… (Patch, Third Party Advisory)
- github.com/stnoonan/spnego-http-auth-nginx-module/releases/tag/v1.1.1 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21335?
- CVE-2021-21335 is a medium-severity vulnerability in Spnego HTTP Authentication Module Project, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-03-08.
- How severe is CVE-2021-21335?
- Medium severity. CVSS v3 base score is 5.3 out of 10.