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Amazon Linux AMI 2: CVE-2021-3618: Security patch for nginx, vsftpd (Multiple Advisories)

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Amazon Linux AMI 2: CVE-2021-3618: Security patch for nginx, vsftpd (Multiple Advisories)

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
03/23/2022
Created
09/28/2023
Added
09/28/2023
Modified
01/23/2024

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.

Solution(s)

  • amazon-linux-ami-2-upgrade-nginx
  • amazon-linux-ami-2-upgrade-nginx-all-modules
  • amazon-linux-ami-2-upgrade-nginx-debuginfo
  • amazon-linux-ami-2-upgrade-nginx-filesystem
  • amazon-linux-ami-2-upgrade-nginx-mod-http-geoip
  • amazon-linux-ami-2-upgrade-nginx-mod-http-image-filter
  • amazon-linux-ami-2-upgrade-nginx-mod-http-perl
  • amazon-linux-ami-2-upgrade-nginx-mod-http-xslt-filter
  • amazon-linux-ami-2-upgrade-nginx-mod-mail
  • amazon-linux-ami-2-upgrade-nginx-mod-stream
  • amazon-linux-ami-2-upgrade-vsftpd
  • amazon-linux-ami-2-upgrade-vsftpd-debuginfo
  • amazon-linux-ami-2-upgrade-vsftpd-sysvinit

References

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