The Quarterly Threat Landscape Report is out. See what attackers are targeting now.Read report
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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade nginx | Mar 26, 2024 | Mar 23, 2022 |
| Amazon Linux Ami 2 | — | Upgrade nginx-mod-http-perlUpgrade nginx-all-modulesUpgrade nginx-mod-mailUpgrade nginxUpgrade nginx-mod-http-image-filterUpgrade vsftpd-sysvinitUpgrade nginx-mod-http-geoipUpgrade nginx-filesystemUpgrade nginx-mod-streamUpgrade nginx-mod-http-xslt-filterUpgrade vsftpd-debuginfoUpgrade vsftpdUpgrade nginx-debuginfo | Sep 28, 2023 | Mar 23, 2022 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-http-xslt-filter-debuginfoUpgrade sendmail-docUpgrade vsftpdUpgrade nginxUpgrade nginx-all-modulesUpgrade sendmail-debugsourceUpgrade vsftpd-debuginfoUpgrade nginx-filesystemUpgrade nginx-mod-mailUpgrade nginx-mod-mail-debuginfoUpgrade sendmail-milter-develUpgrade nginx-core-debuginfoUpgrade sendmail-debuginfoUpgrade vsftpd-debugsourceUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-develUpgrade nginx-mod-http-perlUpgrade nginx-debugsourceUpgrade nginx-mod-stream-debuginfoUpgrade sendmail-milter-debuginfoUpgrade nginx-coreUpgrade sendmailUpgrade sendmail-cfUpgrade sendmail-milterUpgrade nginx-mod-streamUpgrade nginx-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-http-image-filter | Feb 17, 2025 | Jun 9, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Mar 23, 2022 |
| Debian | — | Upgrade vsftpdUpgrade nginxUpgrade sendmail | Nov 24, 2022 | Mar 23, 2022 |
| Huawei Euleros 2_0_sp3 | — | Upgrade nginx | Oct 26, 2021 | Sep 24, 2021 |
| Huawei Euleros 2_0_sp5 | — | Upgrade nginx-mod-http-image-filterUpgrade nginxUpgrade nginx-mod-http-perlUpgrade nginx-mod-mailUpgrade nginx-all-modulesUpgrade nginx-mod-streamUpgrade nginx-filesystemUpgrade nginx-mod-http-xslt-filter | Sep 29, 2021 | Sep 24, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade nginx-mod-mailUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-perlUpgrade nginx-all-modulesUpgrade nginxUpgrade nginx-mod-http-xslt-filterUpgrade nginx-filesystemUpgrade nginx-mod-stream | Sep 24, 2021 | Sep 24, 2021 |
| Nginx | — | Upgrade to nginx version 1.21.0 | Feb 10, 2023 | Mar 23, 2022 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 23, 2022 |
| Suse | — | Upgrade vsftpdUpgrade nginxUpgrade vim-plugin-nginxUpgrade nginx-source | Oct 26, 2022 | Mar 23, 2022 |
| Ubuntu | — | Upgrade libnginx-mod-http-luaUpgrade nginx-lightUpgrade nginx-extrasUpgrade vsftpdUpgrade nginx-fullUpgrade nginx-extras (Ubuntu Pro)Upgrade nginx-core (Ubuntu Pro)Upgrade nginx-light (Ubuntu Pro)Upgrade nginx-core | Apr 13, 2022 | Mar 23, 2022 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 23, 2022 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub