A ruby2.5 security update has been released for Debian GNU/Linux 10 to address several vulnerabilities.

DSA 4721-1: ruby2.5 security update

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Debian Security Advisory DSA-4721-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
July 08, 2020   https://www.debian.org/security/faq
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Package : ruby2.5
CVE ID : CVE-2020-10663 CVE-2020-10933

Several vulnerabilities have been discovered in the interpreter for the
Ruby language.

CVE-2020-10663

Jeremy Evans reported an unsafe object creation vulnerability in the
json gem bundled with Ruby. When parsing certain JSON documents, the
json gem can be coerced into creating arbitrary objects in the
target system.

CVE-2020-10933

Samuel Williams reported a flaw in the socket library which may lead
to exposure of possibly sensitive data from the interpreter.

For the stable distribution (buster), these problems have been fixed in
version 2.5.5-3+deb10u2.

We recommend that you upgrade your ruby2.5 packages.

For the detailed security status of ruby2.5 please refer to its security
tracker page at:
  https://security-tracker.debian.org/tracker/ruby2.5

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/