A golang-websocket security update has been released for Debian GNU/Linux 9 LTS to address an integer overflow vulnerability concerning the length of websocket frames received via a websocket connection.

DLA 2520-1: golang-websocket security update

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Debian LTS Advisory DLA-2520-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Brian May
January 07, 2021   https://wiki.debian.org/LTS
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Package : golang-websocket
Version : 1.1.0-1+deb9u1
CVE ID : CVE-2020-27813

There was an integer overflow vulnerability concerning the length of websocket
frames received via a websocket connection. An attacker could use this flaw to
cause a denial of service attack on an HTTP Server allowing websocket
connections.

For Debian 9 stretch, this problem has been fixed in version
1.1.0-1+deb9u1.

We recommend that you upgrade your golang-websocket packages.

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

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