CVE-2020-28042
Vulnerability Scoring
Attack Complexity Details
- Attack Complexity: Low Impact
- Attack Vector: NETWORK
- Privileges Required: None
- Scope: UNCHANGED
- User Interaction: NONE
CIA Impact Definition
- Confidentiality:
- Integrity: Low Impact
- Availability:
CVE-2020-28042 Vulnerability Summary
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.
Access Complexity Graph for CVE-2020-28042
Impact Analysis for CVE-2020-28042
CVE-2020-28042: Detailed Information and External References
EPSS
0.00262
EPSS %
0.65534
References
0.00262
- 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/
CWE
CWE-347
CAPEC
0.00262
- Padding Oracle Crypto Attack: An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.
- Signature Spoofing by Improper Validation: An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.
Vulnerable Configurations
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cpe:2.3:a:servicestack:servicestack:4.0.10:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.10:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.0.17:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.17:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.0.18:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.18:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.19:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.19:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.20:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.20:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.21:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.21:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.22:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.22:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.23:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.23:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.24:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.24:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.30:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.30:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.31:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.31:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.32:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.32:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.33:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.33:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.34:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.34:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.35:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.35:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.36:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.36:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.38:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.38:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.42:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.42:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.44:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.44:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.46:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.46:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.48:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.48:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.50:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.50:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.52:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.52:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.54:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.54:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.56:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.56:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.58:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.58:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.60:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.60:*:*:*:*:*:*:*
-
cpe:2.3:a:servicestack:servicestack:4.0.62:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.0.62:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.0:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.2:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.2:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.4:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.4:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.6:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.6:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.8:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.8:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.10:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.10:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.12:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.12:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:4.5.14:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:4.5.14:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:5:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:5:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:5.0.2:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:5.1.0:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:5.1.0:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:5.2.0:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:5.4:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:5.4:*:*:*:*:*:*:*
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cpe:2.3:a:servicestack:servicestack:5.5:*:*:*:*:*:*:*
cpe:2.3:a:servicestack:servicestack:5.5:*:*:*:*:*:*:*
CVSS3 Source
nvd@nist.gov
CVSS3 Type
Primary
CVSS3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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