A libproxy security update has been released for Debian GNU/Linux 9 LTS to address a buffer overflow vulnerability.

DLA 2450-1: libproxy security update

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Debian LTS Advisory DLA-2450-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
November 13, 2020   https://wiki.debian.org/LTS
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Package : libproxy
Version : 0.4.14-2+deb9u2
CVE ID : CVE-2020-26154
Debian Bug : 968366

Li Fei found that libproxy, a library for automatic proxy configuration
management, was vulnerable to a buffer overflow vulnerability when
receiving a large PAC file from a server without a Content-Length header
in the response.

For Debian 9 stretch, this problem has been fixed in version
0.4.14-2+deb9u2.

We recommend that you upgrade your libproxy packages.

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

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