A process running under a restrictive seccomp filter that specified multiple syscall arguments could bypass intended access restrictions by specifying a single matching argument. gosu and runc have been rebuilt with the fixed package.

For Debian 9 stretch, this problem has been fixed in version 0.0~git20150813.0.1b506fc-2+deb9u1.

We recommend that you upgrade your golang-github-seccomp-libseccomp-golang, gosu and runc packages.

For the detailed security status of golang-github-seccomp-libseccomp-golang please refer to its security tracker page at: https://security-tracker.debian.org/tracker/golang-github-seccomp-libseccomp-golang

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS