SB2020011323 - HTTP request smuggling in Nginx
Published: January 13, 2020 Updated: May 9, 2025
Security Bulletin ID
SB2020011323
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2019-20372)
The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.
The vulnerability exists with certain error_page configurations. A remote attacker can read unauthorized web pages in environments where NGINX is being fronted by a load balancer.
Remediation
Install update from vendor's website.
References
- http://nginx.org/en/CHANGES
- 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