CVE-2021-41816

Advisory lineage Upstream: 0 Downstream: 15
Modified
Published: 06 Feb 2022, 00:00
Last modified:04 Aug 2024, 03:22

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (nvd)
EPSS Score
0.48% LOW
0% probability -0.42%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

06 Feb 2022, 00:00
Published
Vulnerability first disclosed
04 Aug 2024, 03:22
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.48%• Percentile: 66%

Techniques & Countermeasures

  • CWE-190•Integer Overflow or Wraparound

    The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Affected Systems

  • fedoraproject•fedora

    34 | 35

  • ruby-lang•cgi

    < 0.3.1 | ≤ 0.2.0 | ≤ 0.1.0

References (7)