CVE-2021-3618
Acme Wildcard Certificate Protocol Confusion Attack
Description
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.
INFO
Published Date :
March 23, 2022, 8:15 p.m.
Last Modified :
Feb. 9, 2023, 2:03 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.2
Public PoC/Exploit Available at Github
CVE-2021-3618 has a 3 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-3618
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3618.
| URL | Resource |
|---|---|
| https://alpaca-attack.com/ | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1975623 | Issue Tracking Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00031.html | Mailing List Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Indra is a powerful, versatile, and user-friendly Python-based network scanning and vulnerability assessment tool.
Python
https://eggkingo.github.io/polyblog/
Mode Switcher Framework with Web Server Case Study
security modes resilience mde
Java Xtend GAP
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3618 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3618 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 09, 2023
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/11/msg00031.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/11/msg00031.html Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 23, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/11/msg00031.html [No Types Assigned] -
Modified Analysis by [email protected]
Oct. 27, 2022
Action Type Old Value New Value Changed Reference Type https://alpaca-attack.com/ No Types Assigned https://alpaca-attack.com/ Third Party Advisory -
CVE Modified by [email protected]
Sep. 13, 2022
Action Type Old Value New Value Removed Reference https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991328 [Exploit, Mailing List, Patch, Third Party Advisory] Removed Reference https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991329 [Exploit, Mailing List, Release Notes, Third Party Advisory] Removed Reference https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991331 [Exploit, Mailing List, Patch, Third Party Advisory] Removed Reference https://github.com/nginx/nginx/commit/173f16f736c10eae46cd15dd861b04b82d91a37a [Patch, Third Party Advisory] Removed Reference https://ubuntu.com/security/CVE-2021-3618 [Exploit, Third Party Advisory] Added Reference https://alpaca-attack.com/ [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 04, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991328 No Types Assigned https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991328 Exploit, Mailing List, Patch, Third Party Advisory Changed Reference Type https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991329 No Types Assigned https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991329 Exploit, Mailing List, Release Notes, Third Party Advisory Changed Reference Type https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991331 No Types Assigned https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991331 Exploit, Mailing List, Patch, Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1975623 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1975623 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/nginx/nginx/commit/173f16f736c10eae46cd15dd861b04b82d91a37a No Types Assigned https://github.com/nginx/nginx/commit/173f16f736c10eae46cd15dd861b04b82d91a37a Patch, Third Party Advisory Changed Reference Type https://ubuntu.com/security/CVE-2021-3618 No Types Assigned https://ubuntu.com/security/CVE-2021-3618 Exploit, Third Party Advisory Added CWE NIST CWE-295 Added CPE Configuration OR *cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* versions up to (excluding) 1.21.0 Added CPE Configuration OR *cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:* versions up to (excluding) 8.17 Added CPE Configuration OR *cpe:2.3:a:vsftpd_project:vsftpd:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.4 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3618 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3618
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} -0.00%
score
0.47194
percentile