A ruby-json-jwt security update has been released for Debian GNU/Linux 9 LTS to address an issue where Ruby lacks an element count during the splitting of a JWE string.

DLA 2390-1: ruby-json-jwt security update

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Debian LTS Advisory DLA-2390-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
October 01, 2020   https://wiki.debian.org/LTS
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Package : ruby-json-jwt
Version : 1.6.2-1+deb9u2
CVE ID : CVE-2019-18848
Debian Bug : 944850

The json-jwt gem before 1.11.0 for Ruby lacks an element
count during the splitting of a JWE string.

Therefore, there was a need to explicitly specify the number
of elements when splitting a JWE string.

For Debian 9 stretch, this problem has been fixed in version
1.6.2-1+deb9u2.

We recommend that you upgrade your ruby-json-jwt packages.

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

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