CVE-2020-28042
ServiceStack JWT Signature Verification Vulnerability
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.
INFO
Published Date :
Nov. 2, 2020, 9:15 p.m.
Last Modified :
Nov. 17, 2020, 5:55 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-28042 has a 7 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-28042.
| URL | Resource |
|---|---|
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
TypeScript CSS HTML Go
None
TechCamp 2022 - JSON Web Token 101
None
Python
None
Shell Python
https://github.com/ticarpi/jwt_tool
Python Dockerfile
:snake: A toolkit for testing, tweaking and cracking JSON Web Tokens
Python Dockerfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-28042 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-28042 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Nov. 17, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Changed Reference Type https://forums.servicestack.net/t/servicestack-v5-9-2-released/8850 No Types Assigned https://forums.servicestack.net/t/servicestack-v5-9-2-released/8850 Release Notes, Vendor Advisory Changed Reference Type https://github.com/ServiceStack/ServiceStack/commit/540d4060e877a03ae95343c1a8560a26768585ee No Types Assigned https://github.com/ServiceStack/ServiceStack/commit/540d4060e877a03ae95343c1a8560a26768585ee Patch, Third Party Advisory Changed Reference Type https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypass/ No Types Assigned https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypass/ Exploit, Third Party Advisory Changed Reference Type https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestack/ No Types Assigned https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestack/ Exploit, Third Party Advisory Added CWE NIST CWE-347 Added CPE Configuration OR *cpe:2.3:a:servicestack:servicestack:*:*:*:*:*:*:*:* versions up to (excluding) 5.9.2 -
CVE Modified by [email protected]
Nov. 04, 2020
Action Type Old Value New Value Added Reference https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypass/ [No Types Assigned] Added Reference https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestack/ [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-28042 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-28042
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.26 }} 0.04%
score
0.65904
percentile