Improper Certificate Validation Affecting nginx package, versions *
Snyk CVSS
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-DEBIAN9-NGINX-1320231
- published 21 Jul 2021
- disclosed 23 Mar 2022
Introduced: 21 Jul 2021
CVE-2021-3618 Open this link in a new tabHow to fix?
There is no fixed version for Debian:9
nginx
.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nginx
package and not the nginx
package as distributed by Debian
.
See How to fix?
for Debian:9
relevant fixed versions and status.
ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.
References
- https://security-tracker.debian.org/tracker/CVE-2021-3618
- https://bugzilla.redhat.com/show_bug.cgi?id=1975623
- https://ubuntu.com/security/CVE-2021-3618
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991328
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991329
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991331
- https://github.com/nginx/nginx/commit/173f16f736c10eae46cd15dd861b04b82d91a37a
- https://alpaca-attack.com/
- https://lists.debian.org/debian-lts-announce/2022/11/msg00031.html