CVE-2021-26813

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.
Overview
  • CVE ID
  • CVE-2021-26813
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-03-03T16:15:13
  • Last Modified Date
  • 2022-05-23T16:00:15
Weakness Enumerations
CWE URL
NVD-CWE-Other http://cwe.mitre.org/data/definitions/NVD-Other.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:markdown2_project:markdown2:*:*:*:*:*:*:*:* 1 OR 1.0.1.18 2.4.0
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/trentm/python-markdown2/pull/387 Exploit Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BRP5RN35JZTSJ3JT4722F447ZDK7LZS5/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JTIX5UXRDJZJ57DO4V33ZNJTNKWGBQLY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J752422YELXLMLZJPVJVKD2KKHHQRVEH/
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-26813
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26813
History
Created Old Value New Value Data Type Notes
2022-05-10 16:16:37 Added to TrackCVE
2022-12-05 23:02:36 2021-03-03T16:15Z 2021-03-03T16:15:13 CVE Published Date updated
2022-12-05 23:02:36 2022-05-23T16:00:15 CVE Modified Date updated
2022-12-05 23:02:36 Analyzed Vulnerability Status updated