For Debian 9 stretch, this problem has been fixed in version
4.5.2-2+deb9u1.
We recommend that you upgrade your httpcomponents-client packages.
For the detailed security status of httpcomponents-client please refer
to its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/httpcomponents-client
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
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