Vulnerability Details : CVE-2021-3618

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.
Published 2022-03-23 20:15:10
Updated 2023-02-09 02:03:34
Source Red Hat, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-3618

Threat overview for CVE-2021-3618

Top countries where our scanners detected CVE-2021-3618
Top open port discovered on systems with this issue 80
IPs affected by CVE-2021-3618 4,754,349
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-3618!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-3618

EPSS FAQ
0.11%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 44 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-3618

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
 MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N
8.6
4.9
 NIST
7.4
 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
2.2
5.2
 NIST

CWE ids for CVE-2021-3618

References for CVE-2021-3618

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