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Integer Overflow or Wraparound Affecting ruby2.7 package, versions <2.7.4-1+deb11u1

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.81% (82nd percentile)
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NVD
9.8 critical
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIAN11-RUBY27-1933848
  • published 1 Dec 2021
  • disclosed 6 Feb 2022
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Introduced: 1 Dec 2021

CVE-2021-41816 Open this link in a new tab
CWE-190 Open this link in a new tab

How to fix?

Upgrade Debian:11 ruby2.7 to version 2.7.4-1+deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby2.7 package and not the ruby2.7 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

CGI.escape_html in Ruby before 2.7.5 and 3.x before 3.0.3 has an integer overflow and resultant buffer overflow via a long string on platforms (such as Windows) where size_t and long have different numbers of bytes. This also affects the CGI gem before 0.3.1 for Ruby.

References