CVE-2021-41817
HIGH
7.5
CVSS Score
Published: January 1, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:08 AM UTC
9 products affected across 6 vendorsDebian LinuxFedoraEnterprise Linux
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Severity
HIGH7.5
Exploit prediction
EPSS 3%
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%All versions
Leap· openSUSEdrupal
95%All versions
Date· Ruby Langrubygems
95%Affected range stops below 2.0.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.1.2, so it looks safe — our inference, not a vendor statement
Ruby· Ruby Langrubygems
95%2.6.0 ≤ v < 2.6.92.7.0 ≤ v < 2.7.53.0.0 ≤ v < 3.0.3
Affected range stops below 2.6.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.7.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.3, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/
- https://security.gentoo.org/glsa/202401-27
- https://www.ruby-lang.org/en/news/2021/11/15/date-parsing-method-regexp-dos-cve-2021-41817/
References (5)
ExploitVendor Advisory
Source: [email protected]
https://www.ruby-lang.org/en/news/2021/11/15/date-parsing-method-regexp-dos-cve-2021-41817/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-1333
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