Описание
CGI has Denial of Service (DoS) potential in Cookie.parse
There is a possibility for DoS by in the cgi gem. This vulnerability has been assigned the CVE identifier CVE-2025-27219. We recommend upgrading the cgi gem.
Details
CGI::Cookie.parse took super-linear time to parse a cookie string in some cases. Feeding a maliciously crafted cookie string into the method could lead to a Denial of Service.
Please update CGI gem to version 0.3.5.1, 0.3.7, 0.4.2 or later.
Affected versions
cgi gem versions <= 0.3.5, 0.3.6, 0.4.0 and 0.4.1.
Credits
Thanks to lio346 for discovering this issue. Also thanks to mame for fixing this vulnerability.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2025-27219
- https://github.com/ruby/cgi/pull/52
- https://github.com/ruby/cgi/pull/53
- https://github.com/ruby/cgi/pull/54
- https://hackerone.com/reports/2936778
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml
- https://www.cve.org/CVERecord?id=CVE-2025-27219
Пакеты
cgi
< 0.3.5.1
0.3.5.1
cgi
= 0.3.6
0.3.7
cgi
>= 0.4.0, < 0.4.2
0.4.2
EPSS
6.3 Medium
CVSS4
5.8 Medium
CVSS3
CVE ID
Дефекты
Связанные уязвимости
In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.
In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.
In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.
In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in ...
EPSS
6.3 Medium
CVSS4
5.8 Medium
CVSS3