Executive Summary

Informations
Name CVE-2021-3618 First vendor Publication 2022-03-23
Vendor Cve Last vendor Modification 2022-04-04

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Overall CVSS Score 7.4
Base Score 7.4 Environmental Score 7.4
impact SubScore 5.2 Temporal Score 7.4
Exploitabality Sub Score 2.2
 
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:N)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3618

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-295 Certificate Issues

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 464
Application 77
Application 2
Os 3

Sources (Detail)

Source Url
MISC 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://bugzilla.redhat.com/show_bug.cgi?id=1975623
https://github.com/nginx/nginx/commit/173f16f736c10eae46cd15dd861b04b82d91a37a
https://ubuntu.com/security/CVE-2021-3618

Alert History

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0
1
2
Date Informations
2022-04-05 00:23:15
  • Multiple Updates
2022-03-24 17:22:55
  • Multiple Updates
2022-03-24 00:22:53
  • First insertion