Debian: DSA-4617-1 Critical: Qt Library Code Execution Threat

Two security issues were found in the Qt library, which could result in
plugins and libraries being loaded from the current working directory,
resulting in potential code execution.

For the oldstable distribution (stretch), these problems have been fixed
in version 5.7.1+dfsg-3+deb9u2.

For the stable distribution (buster), these problems have been fixed in
version 5.11.3+dfsg1-1+deb10u3.

We recommend that you upgrade your qtbase-opensource-src packages.

For the detailed security status of qtbase-opensource-src please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/qtbase-opensource-src

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