CVE-2020-5238

CVSS V2 Medium 4 CVSS V3 Medium 6.5
Description
The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.
Overview
  • CVE ID
  • CVE-2020-5238
  • Assigner
  • security-advisories@github.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-07-01T23:15:10
  • Last Modified Date
  • 2023-01-28T01:44:36
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:github_flavored_markdown_project:github_flavored_markdown:*:*:*:*:*:*:*:* 1 OR 0.29.0.gfm.1
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:S/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4 Patch Third Party Advisory
https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-5238
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5238
History
Created Old Value New Value Data Type Notes
2022-05-10 17:10:09 Added to TrackCVE
2022-12-04 19:05:27 2020-07-01T23:15Z 2020-07-01T23:15:10 CVE Published Date updated
2022-12-04 19:05:27 2020-10-06T18:15:17 CVE Modified Date updated
2022-12-04 19:05:27 Undergoing Analysis Vulnerability Status updated
2023-01-28 02:10:09 2023-01-28T01:44:36 CVE Modified Date updated
2023-01-28 02:10:09 Undergoing Analysis Analyzed Vulnerability Status updated