Thinbus Javascript Secure Remote Password is a browser SRP6a implementation for zero-knowledge password authentication. In versions 2.0.0 and below, a protocol compliance bug causes the client to generate a fixed 252 bits of entropy instead of the intended bit length of the safe prime (defaulted to 2048 bits). The client public value is being generated from a private value that is 4 bits below the specification. This reduces the protocol's designed security margin it is now practically exploitable. The servers full sized 2048 bit random number is used to create the shared session key and password proof. This is fixed in version 2.0.1.
Metrics
Affected Vendors & Products
References
History
Thu, 07 Aug 2025 15:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
|
Thu, 07 Aug 2025 00:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Description | Thinbus Javascript Secure Remote Password is a browser SRP6a implementation for zero-knowledge password authentication. In versions 2.0.0 and below, a protocol compliance bug causes the client to generate a fixed 252 bits of entropy instead of the intended bit length of the safe prime (defaulted to 2048 bits). The client public value is being generated from a private value that is 4 bits below the specification. This reduces the protocol's designed security margin it is now practically exploitable. The servers full sized 2048 bit random number is used to create the shared session key and password proof. This is fixed in version 2.0.1. | |
Title | Thinbus generates insufficient entropy: 252 bits vs minimum 256 bits | |
Weaknesses | CWE-331 | |
References |
| |
Metrics |
cvssV4_0
|

Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-08-07T00:02:42.612Z
Updated: 2025-08-07T14:13:18.243Z
Reserved: 2025-07-31T17:23:33.476Z
Link: CVE-2025-54885

Updated: 2025-08-07T14:13:15.447Z

Status : Awaiting Analysis
Published: 2025-08-07T01:15:26.693
Modified: 2025-08-07T21:26:37.453
Link: CVE-2025-54885

No data.