High severity · published Nov 18, 2022
CVE-2021-33621
The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting
8.8
CVSS
2.5%
EPSS
No
On KEV
Description
The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.5% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CG
Cgi · Ruby-lang
before 0.1.0.2; 0.2.0 before 0.2.2; 0.3.0 before 0.3.5 · source: NVD
FE
Fedora · Fedoraproject
35; 36; 37 · source: NVD
RU
Ruby · Ruby-lang
2.7.0 before 2.7.7; 3.0.0 before 3.0.5; 3.1.0 before 3.1.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33621
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33621
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/06/msg00012.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/
security.gentoo.org
https://security.gentoo.org/glsa/202401-27
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221228-0004/
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