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.

CVSS v3.0 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	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

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Configurations

Configuration 1 (hide)

cpe:2.3:a:servicestack:servicestack:*:*:*:*:*:*:*:*

Information

Published : 2020-11-02 13:15

Updated : 2020-11-17 09:55

NVD link : CVE-2020-28042

Mitre link : CVE-2020-28042

JSON object : View

CWE

CWE-347

Improper Verification of Cryptographic Signature

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Products Affected

servicestack

servicestack

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