CVE-2021-41817
HIGH7.5EPSS 0.50%ruby2.3 - security update
Published: 11/16/2021Modified: 4/28/2026
Description
Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS (regular expression Denial of Service) via a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1.
Affected packages (6)
- Alpine/rubyfrom 0, < 2.7.5-r0
- Bitnami/ruby>= 2.6.0, < 2.6.9, >= 2.7.0, < 2.7.5, >= 3.0.0, < 3.0.3
- Bitnami/ruby-min>= 2.6.0, < 2.6.9, >= 2.7.0, < 2.7.5, >= 3.0.0, < 3.0.3
- Debian/ruby2.3from 0, < 2.3.3-1+deb9u11
- Debian/ruby2.7from 0, < 2.7.4-1+deb11u1
- RubyGems/date>= 3.2.0, < 3.2.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (16)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-41817
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2021-41817
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-41817
- PATCHhttps://github.com/ruby/date
- WEBhttps://github.com/ruby/date/commit/3959accef8da5c128f8a8e2fd54e932a4fb253b0
- WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/date/CVE-2021-41817.yml
- WEBhttps://hackerone.com/reports/1254844
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF
- WEBhttps://security.gentoo.org/glsa/202401-27
- WEBhttps://www.ruby-lang.org/en/news/2021/11/15/date-parsing-method-regexp-dos-cve-2021-41817
- WEBhttps://www.ruby-lang.org/en/news/2021/11/15/date-parsing-method-regexp-dos-cve-2021-41817/