Buffer Overflow Affecting cgi package, versions <0.3.1 >=0.2.0, <0.2.1 >=0.1.0, <0.1.1


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Proof of concept
    EPSS
    1.05% (85th percentile)

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  • Snyk ID SNYK-RUBY-CGI-1930667
  • published 25 Nov 2021
  • disclosed 25 Nov 2021
  • credit chamal

How to fix?

Upgrade cgi to version 0.3.1, 0.2.1, 0.1.1 or higher.

Overview

cgi is a Support for the Common Gateway Interface protocol.

Affected versions of this package are vulnerable to Buffer Overflow when a very large string (> 700 MB) is passed to CGI.escape_html on a platform where long type takes 4 bytes.

CVSS Scores

version 3.1
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Snyk

7.3 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    Low
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NVD

9.8 critical
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Red Hat

7.5 high