Signature validation bypass in ServiceStack
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-28042US | medium5.3 | Exploit | ||
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. | ||||
02
references
External citations — patches, advisories, analysis.
- https://forums.servicestack.net/t/servicestack-v5-9-2-released/8850WEB
- https://github.com/ServiceStack/ServiceStack/commit/540d4060e877a03ae95343c1a8560a26768585eeWEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-28042ADVISORY
- https://snyk.io/vuln/SNYK-DOTNET-SERVICESTACK-1035519WEB
- https://www.nuget.org/packages/ServiceStackWEB
- https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypassWEB
- https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestackWEB
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