It was discovered that zstd, a compression utility, was vulnerable
to a race condition: it temporarily exposed, during a very short
timeframe, a world-readable version of its input even if the
original file had restrictive permissions.
For Debian 9 stretch, this problem has been fixed in version
We recommend that you upgrade your libzstd packages.
For the detailed security status of libzstd please refer to
its security tracker page at:
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
Debian LTS Advisory DLA-2573-1 [email protected]
https://www.debian.org/lts/security/ Utkarsh Gupta
February 20, 2021 https://wiki.debian.org/LTS
Version : 1.1.2-1+deb9u1