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CVE-2021-41819

Good to know:

Date: December 31, 2021

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.

Language: Ruby

Severity Score

7.5

Related Resources (17)

Url: https://security.gentoo.org/glsa/202401-27

Url: https://github.com/ruby/cgi

Url: https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-41819.yml

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/

Url: https://hackerone.com/reports/910552

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-41819

Url: https://access.redhat.com/security/cve/CVE-2021-41819

Url: https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/

Url: https://security.netapp.com/advisory/ntap-20220121-0003

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF

Url: https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/

Url: https://security.netapp.com/advisory/ntap-20220121-0003/

Url: https://www.mend.io/vulnerability-database/CVE-2021-41819

Severity Score

7.5

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

Reliance on Cookies without Validation and Integrity Checking

CWE-565

Top Fix

Upgrade Version

Upgrade to version v0.3.1

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	HIGH
Availability (A):	NONE

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

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