A yaws security update has been released for Debian GNU/Linux 9 LTS to address two security issues.

DLA 2384-1: yaws security update

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Debian LTS Advisory DLA-2384-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
September 26, 2020   https://wiki.debian.org/LTS
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Package : yaws
Version : 2.0.4+dfsg-1+deb9u1
CVE ID : CVE-2020-24379 CVE-2020-24916

Two issues have been found in yaws, a high performance HTTP 1.1 webserver
written in Erlang.

CVE-2020-24379
Reject external resource requests in DAV in order to avoid
XML External Entity (XXE) attackes.

CVE-2020-24916
Sanitize CGI executable in order to avoid command injection
via CGI requests.

For Debian 9 stretch, these problems have been fixed in version
2.0.4+dfsg-1+deb9u1.

We recommend that you upgrade your yaws packages.

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

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