CVE-2019-20372
Moderate
CVE-2019-20372
NGINX before 1.17.7, with certain error_page configurations, allows HTTP request smuggling, as demonstrated by the ability of an attacker to read unauthorized web pages in environments where NGINX is being fronted by a load balancer.
Exploit probability
15.0%
Published
January 9, 2020
Required by
Not available
Last source change
July 8, 2026
02 / AFFECTED SOFTWARE
Affected packages
445 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2019-20372
View original source
NGINX before 1.17.7, with certain error_page configurations, allows HTTP request smuggling, as demonstrated by the ability of an attacker to read unauthorized web pages in environments where NGINX is being fronted by a load balancer.
05 / REFERENCES
Further evidence
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00013.html
- http://nginx.org/en/CHANGES
- http://seclists.org/fulldisclosure/2021/Sep/36
- https://bertjwregeer.keybase.pub/2019-12-10%20-%20error_page%20request%20smuggling.pdf
- https://duo.com/docs/dng-notes#version-1.5.4-january-2020
- https://github.com/kubernetes/ingress-nginx/pull/4859
- https://github.com/nginx/nginx/commit/c1be55f97211d38b69ac0c2027e6812ab8b1b94e
- https://security.netapp.com/advisory/ntap-20200127-0003/
- https://support.apple.com/kb/HT212818
- https://usn.ubuntu.com/4235-1/
- https://usn.ubuntu.com/4235-2/