Vulnerability Monitor

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CVE-2021-41816

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.

Published

2022-02-06T21:15:07.887

Last Modified

2024-11-21T06:26:48.520

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-190

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	ruby-lang	cgi	< 0.3.1	Yes
Application	ruby-lang	cgi	≤ 0.2.0	Yes
Application	ruby-lang	ruby	< 3.0.3	No
Application	ruby-lang	cgi	≤ 0.1.0	Yes
Application	ruby-lang	ruby	< 2.7.5	No
Operating System	fedoraproject	fedora	34	Yes
Operating System	fedoraproject	fedora	35	Yes

References

https://hackerone.com/reports/1328463 Permissions Required, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/ ([email protected])
https://security-tracker.debian.org/tracker/CVE-2021-41816 Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202401-27 ([email protected])
https://security.netapp.com/advisory/ntap-20220303-0006/ Third Party Advisory ([email protected])
https://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/ Exploit, Vendor Advisory ([email protected])
https://hackerone.com/reports/1328463 Permissions Required, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/ (af854a3a-2127-422b-91ae-364da2661108)
https://security-tracker.debian.org/tracker/CVE-2021-41816 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202401-27 (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20220303-0006/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/ Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)