CVE-2021-3449

Public on 2021-03-25
Modified on 2021-03-25
Description
A flaw was found in openssl. A server crash and denial of service attack could occur if a client sends a TLSv1.2 renegotiation ClientHello and omits the signature_algorithms extension but includes a signature_algorithms_cert extension. The highest threat from this vulnerability is to system availability.
Severity
Important severity
Important
See what this means
CVSS v3 Base Score
5.9
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core edk2 2024-03-18 ALAS2-2024-2502 Fixed
Amazon Linux 2 - Core openssl11 2021-03-26 ALAS2-2021-1622 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv3 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2021-3449 Mitre: CVE-2021-3449