Vulnerability Details CVE-2020-28042
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.202
EPSS Ranking 95.3%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 5.0
References
- https://forums.servicestack.net/t/servicestack-v5-9-2-released/8850
- https://github.com/ServiceStack/ServiceStack/commit/540d4060e877a03ae95343c1a8560a26768585ee
- https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypass/
- https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestack/
- https://forums.servicestack.net/t/servicestack-v5-9-2-released/8850
- https://github.com/ServiceStack/ServiceStack/commit/540d4060e877a03ae95343c1a8560a26768585ee
- https://www.shielder.it/advisories/servicestack-jwt-signature-verification-bypass/
- https://www.shielder.it/blog/2020/11/re-discovering-a-jwt-authentication-bypass-in-servicestack/
Products affected by CVE-2020-28042
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cpe:2.3:a:servicestack:servicestack:4.0.10
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cpe:2.3:a:servicestack:servicestack:4.0.17
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cpe:2.3:a:servicestack:servicestack:4.0.18
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cpe:2.3:a:servicestack:servicestack:4.0.19
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cpe:2.3:a:servicestack:servicestack:4.0.20
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cpe:2.3:a:servicestack:servicestack:4.0.21
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cpe:2.3:a:servicestack:servicestack:4.0.22
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cpe:2.3:a:servicestack:servicestack:4.0.23
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cpe:2.3:a:servicestack:servicestack:4.0.24
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cpe:2.3:a:servicestack:servicestack:4.0.30
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cpe:2.3:a:servicestack:servicestack:4.0.31
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cpe:2.3:a:servicestack:servicestack:4.0.32
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cpe:2.3:a:servicestack:servicestack:4.0.33
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cpe:2.3:a:servicestack:servicestack:4.0.34
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cpe:2.3:a:servicestack:servicestack:4.0.35
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cpe:2.3:a:servicestack:servicestack:4.0.36
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cpe:2.3:a:servicestack:servicestack:4.0.38
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cpe:2.3:a:servicestack:servicestack:4.0.42
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cpe:2.3:a:servicestack:servicestack:4.0.44
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cpe:2.3:a:servicestack:servicestack:4.0.46
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cpe:2.3:a:servicestack:servicestack:4.0.48
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cpe:2.3:a:servicestack:servicestack:4.0.50
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cpe:2.3:a:servicestack:servicestack:4.0.52
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cpe:2.3:a:servicestack:servicestack:4.0.54
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cpe:2.3:a:servicestack:servicestack:4.0.56
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cpe:2.3:a:servicestack:servicestack:4.0.58
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cpe:2.3:a:servicestack:servicestack:4.0.60
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cpe:2.3:a:servicestack:servicestack:4.0.62
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cpe:2.3:a:servicestack:servicestack:4.5.0
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cpe:2.3:a:servicestack:servicestack:4.5.10
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cpe:2.3:a:servicestack:servicestack:4.5.12
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cpe:2.3:a:servicestack:servicestack:4.5.14
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cpe:2.3:a:servicestack:servicestack:4.5.2
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cpe:2.3:a:servicestack:servicestack:4.5.4
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cpe:2.3:a:servicestack:servicestack:4.5.6
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cpe:2.3:a:servicestack:servicestack:4.5.8
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cpe:2.3:a:servicestack:servicestack:5
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cpe:2.3:a:servicestack:servicestack:5.0.2
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cpe:2.3:a:servicestack:servicestack:5.1.0
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cpe:2.3:a:servicestack:servicestack:5.2.0
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cpe:2.3:a:servicestack:servicestack:5.4
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cpe:2.3:a:servicestack:servicestack:5.5