A buffer overflow was discovered in Brotli, a generic-purpose lossless compression suite.
For Debian 9 stretch, this problem has been fixed in version 0.5.2+dfsg-2+deb9u1.
We recommend that you upgrade your brotli packages.
For the detailed security status of brotli please refer to its security tracker page at: https://security-tracker.debian.org/tracker/brotli
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