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Buffer overrun in CGI.escape_html

Critical severity GitHub Reviewed Published Dec 14, 2021 to the GitHub Advisory Database • Updated Jan 24, 2024

Package

bundler cgi (RubyGems)

Affected versions

>= 0.3.0, < 0.3.1
>= 0.2.0, < 0.2.1
< 0.1.0.1

Patched versions

0.3.1
0.2.1
0.1.0.1

Description

A buffer overrun vulnerability was discovered in CGI.escape_html. This can lead to a buffer overflow when a user passes a very large string (> 700 MB) to CGI.escape_html on a platform where long type takes 4 bytes, typically, Windows.

References

Reviewed Dec 14, 2021
Published to the GitHub Advisory Database Dec 14, 2021
Published by the National Vulnerability Database Feb 6, 2022
Last updated Jan 24, 2024

Severity

Critical
9.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2021-41816

GHSA ID

GHSA-5cqm-crxm-6qpv

Source code

Credits

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