9.8

CVE-2021-41816

Exploit

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.

Data is provided by the National Vulnerability Database (NVD)
Ruby-lang ≫ Cgi SwPlatformruby Version < 0.3.1
Ruby-lang ≫ Cgi SwPlatformruby Version <= 0.2.0
   Ruby-lang ≫ Ruby Version >= 3.0.0 < 3.0.3
Ruby-lang ≫ Cgi SwPlatformruby Version <= 0.1.0
   Ruby-lang ≫ Ruby Version >= 2.7.0 < 2.7.5
Fedoraproject ≫ Fedora Version34
Fedoraproject ≫ Fedora Version35
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.91% 0.75
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 7.5 10 6.4
AV:N/AC:L/Au:N/C:P/I:P/A:P
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.

https://hackerone.com/reports/1328463
Third Party Advisory
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