nginx: ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different proto...
CVE-2021-3618 is fixed in 55 products on 1 platform, first by libnginx-mod-http-auth-pam 1.14.0-0ubuntu1.10, released March 23, 2022. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libnginx-mod-http-auth-pam · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-auth-pam 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-auth-pam · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-auth-pam 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-auth-pam · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-auth-pam 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-cache-purge · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-cache-purge 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-cache-purge · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-cache-purge 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-cache-purge · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-cache-purge 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-dav-ext · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-dav-ext 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-dav-ext · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-dav-ext 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-dav-ext · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-dav-ext 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-echo · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-echo 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-echo · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-echo 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-echo · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-echo 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-fancyindex · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-fancyindex 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-fancyindex · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-fancyindex 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-fancyindex · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-fancyindex 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-geoip · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-geoip 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-geoip · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-geoip 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-geoip · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-geoip 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-geoip2 · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-geoip2 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-geoip2 · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-geoip2 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-headers-more-filter · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-headers-more-filter 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-headers-more-filter · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-headers-more-filter 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-headers-more-filter · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-headers-more-filter 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-image-filter · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-image-filter 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-image-filter · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-image-filter 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-image-filter · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-image-filter 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-lua · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-lua 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-lua · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-lua 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-ndk · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-ndk 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-ndk · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-ndk 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-ndk · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-ndk 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-perl · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-perl 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-perl · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-perl 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-perl · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-perl 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-subs-filter · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-subs-filter 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-subs-filter · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-subs-filter 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-subs-filter · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-subs-filter 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-uploadprogress · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-uploadprogress 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-uploadprogress · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-uploadprogress 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-uploadprogress · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-uploadprogress 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-upstream-fair · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-upstream-fair 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-upstream-fair · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-upstream-fair 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-upstream-fair · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-upstream-fair 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-http-xslt-filter · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-http-xslt-filter 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-http-xslt-filter · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-http-xslt-filter 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-http-xslt-filter · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-http-xslt-filter 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-mail · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-mail 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-mail · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-mail 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-mail · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-mail 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-nchan · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-nchan 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-nchan · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-nchan 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-nchan · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-nchan 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-rtmp · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-rtmp 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-rtmp · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-rtmp 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-rtmp · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-rtmp 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-stream · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | libnginx-mod-stream 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| libnginx-mod-stream · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | libnginx-mod-stream 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| libnginx-mod-stream · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-stream 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-stream-geoip · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-stream-geoip 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| libnginx-mod-stream-geoip2 · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | libnginx-mod-stream-geoip2 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx · Debian 12.15 (bookworm) | 1.20.2-2 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| nginx · Debian 13.5 (trixie) | 1.20.2-2 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| nginx · Debian 14 | 1.20.2-2 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| nginx · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | nginx 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| nginx · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | nginx 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| nginx · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | nginx 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-all-modules · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-common · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | nginx-common 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| nginx-common · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | nginx-common 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| nginx-common · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | nginx-common 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx-core · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | nginx-core 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| nginx-core · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | nginx-core 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| nginx-core · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | nginx-core 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx-core · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-core-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-debugsource · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-extras · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | nginx-extras 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| nginx-extras · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | nginx-extras 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| nginx-extras · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | nginx-extras 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx-filesystem · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-full · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | nginx-full 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| nginx-full · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | nginx-full 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| nginx-full · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | nginx-full 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx-light · Ubuntu 18.04.6 LTS (bionic) | 1.14.0-0ubuntu1.10 | nginx-light 1.14.0-0ubuntu1.10 | Mar 23, 2022 |
| nginx-light · Ubuntu 20.04 LTS (focal) | 1.18.0-0ubuntu1.3 | nginx-light 1.18.0-0ubuntu1.3 | Mar 23, 2022 |
| nginx-light · Ubuntu 22.04.1 LTS (jammy) | 1.18.0-6ubuntu14.1 | nginx-light 1.18.0-6ubuntu14.1 | Mar 23, 2022 |
| nginx-mod-devel · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-http-image-filter · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-http-image-filter-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-http-perl · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-http-perl-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-http-xslt-filter · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-http-xslt-filter-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-mail · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-mail-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-stream · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| nginx-mod-stream-debuginfo · amzn 2023 | 1:1.22.1-1.amzn2023.0.2 | ALAS2023-2023-099 | Feb 17, 2023 |
| sendmail · Debian 12.15 (bookworm) | 8.16.1-2 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| sendmail · Debian 13.5 (trixie) | 8.16.1-2 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| sendmail · Debian 14 | 8.16.1-2 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| sendmail · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-cf · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-debuginfo · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-debugsource · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-doc · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-milter · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-milter-debuginfo · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| sendmail-milter-devel · amzn 2023 | 8.17.1-5.amzn2023.0.4 | ALAS2023-2023-018 | Feb 17, 2023 |
| vsftpd · Debian 13.5 (trixie) | 3.0.5-0.1 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| vsftpd · Debian 14 | 3.0.5-0.1 | DEBIAN-CVE-2021-3618 | Mar 23, 2022 |
| vsftpd · Ubuntu 20.04 LTS (focal) | 3.0.5-0ubuntu0.20.04.1 | vsftpd 3.0.5-0ubuntu0.20.04.1 | Mar 23, 2022 |
| vsftpd · amzn 2023 | 3.0.5-1.amzn2023.0.2 | ALAS2023-2023-019 | Feb 17, 2023 |
| vsftpd-debuginfo · amzn 2023 | 3.0.5-1.amzn2023.0.2 | ALAS2023-2023-019 | Feb 17, 2023 |
| vsftpd-debugsource · amzn 2023 | 3.0.5-1.amzn2023.0.2 | ALAS2023-2023-019 | Feb 17, 2023 |
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