CVE-2020-28042

CVSS V2 Medium 5 CVSS V3 Medium 5.3
Description
ServiceStack before 5.9.2 mishandles JWT signature verification unless an application has a custom ValidateToken function that establishes a valid minimum length for a signature.
Overview
  • CVE ID
  • CVE-2020-28042
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-11-02T21:15:31
  • Last Modified Date
  • 2020-11-17T17:55:08
Weakness Enumerations
CWE URL
CWE-347 http://cwe.mitre.org/data/definitions/347.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:servicestack:servicestack:*:*:*:*:*:*:*:* 1 OR 5.9.2
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • 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:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 5.3
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 1.4
References
Reference URL Reference Tags
https://forums.servicestack.net/t/servicestack-v5-9-2-released/8850 Release Notes Vendor Advisory
https://github.com/ServiceStack/ServiceStack/commit/540d4060e877a03ae95343c1a8560a26768585ee Patch Third Party Advisory
https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypass/ Exploit Third Party Advisory
https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestack/ Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-28042
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28042
History
Created Old Value New Value Data Type Notes
2022-05-10 16:19:39 Added to TrackCVE
2022-12-05 15:58:55 2020-11-02T21:15Z 2020-11-02T21:15:31 CVE Published Date updated
2022-12-05 15:58:55 2020-11-17T17:55:08 CVE Modified Date updated
2022-12-05 15:58:55 Analyzed Vulnerability Status updated