Vulnerabilities in pkg:gem/date
PACKAGECVE-2021-41817 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Date libraries in the RubyGems ecosystem. The issue involves regular expression denial of service vulnerability (redos) in date. Remediation is available by upgrading affected packages to version 3.2.1, 3.1.2, 3.0.2, 2.0.1.
pkg:gem/date
Vulnerability advisories affecting package pkg:gem/date. Select an advisory below to view technical details or fixes.
| Advisory ID | CVE / NVD | Severity | Summary |
|---|---|---|---|
| GHSA-qg54-694p-wgpp | CVE-2021-41817 | HIGH | Regular expression denial of service vulnerability (ReDoS) in date |
CVE-2021-41817 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2021-41817
To remediate this vulnerability, upgrade all affected Date dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade date to 3.2.1
Upgrade date to 3.1.2
Upgrade date to 3.0.2
Upgrade date to 2.0.1
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for date
How to Check if You Are Affected
To determine whether your application is affected by CVE-2021-41817, inspect your project dependencies for Date:
inspect dependencies for date
Analyze the terminal output to locate any version of Date in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2.1), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Date, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-41817 Affected Date Versions
4 component(s)References
Frequently Asked Questions
What is CVE-2021-41817?
Which Date versions are affected?
What version fixes CVE-2021-41817?
Is date affected?
What is the CVSS score of CVE-2021-41817?
What CWE is associated with CVE-2021-41817?
How can I check RubyGems dependencies for CVE-2021-41817?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-qg54-694p-wgpp",
"modified" : "2024-01-24T19:18:37Z",
"published" : "2021-11-16T00:32:30Z",
"aliases" : [ "CVE-2021-41817" ],
"summary" : "Regular expression denial of service vulnerability (ReDoS) in date",
"details" : "Date’s parsing methods including Date.parse are using Regexps internally, some of which are vulnerable against regular expression denial of service. Applications and libraries that apply such methods to untrusted input may be affected.\n\nThe fix limits the input length up to 128 bytes by default instead of changing the regexps. This is because Date gem uses many Regexps and it is possible that there are still undiscovered vulnerable Regexps. For compatibility, it is allowed to remove the limitation by explicitly passing limit keywords as nil like Date.parse(str, limit: nil), but note that it may take a long time to parse.\n\nPlease update the date gem to version 3.2.1, 3.1.2, 3.0.2, and 2.0.1, or later. You can use gem update date to update it. If you are using bundler, please add gem \"date\", \">= 3.2.1\" to your Gemfile. If you import `date` from the standard library rather than as a gem you should update your Ruby install to `3.0.3`, `2.7.5`, `2.6.9` or later.\n\nUsers unable to upgrade may consider using `Date.strptime` instead with a predefined date format\n```ruby\nDate.strptime('2001-02-20', '%Y-%m-%d')\n```",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "RubyGems",
"name" : "date"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.2.0"
}, {
"fixed" : "3.2.1"
} ]
} ]
}, {
"package" : {
"ecosystem" : "RubyGems",
"name" : "date"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.1.0"
}, {
"fixed" : "3.1.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "RubyGems",
"name" : "date"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.0.0"
}, {
"fixed" : "3.0.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "RubyGems",
"name" : "date"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.0.1"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-41817"
}, {
"type" : "WEB",
"url" : "https://github.com/ruby/date/commit/3959accef8da5c128f8a8e2fd54e932a4fb253b0"
}, {
"type" : "WEB",
"url" : "https://hackerone.com/reports/1254844"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/ruby/date"
}, {
"type" : "WEB",
"url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/date/CVE-2021-41817.yml"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF"
}, {
"type" : "WEB",
"url" : "https://security.gentoo.org/glsa/202401-27"
}, {
"type" : "WEB",
"url" : "https://www.ruby-lang.org/en/news/2021/11/15/date-parsing-method-regexp-dos-cve-2021-41817"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1333" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2021-11-16T00:15:43Z",
"nvd_published_at" : "2022-01-01T05:15:00Z"
}
}