PT-2025-32241 · Unknown · Thinbus-Srp-Npm

Svenschindler · Published 2025-08-06 · Updated 2025-08-07 · CVE-2025-54885

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions thinbus-srp-npm versions 2.0.0 and below

Description A protocol compliance bug exists in the Javascript Secure Remote Password implementation, specifically in the client's entropy generation. The client generates a fixed 252 bits of entropy instead of the intended bit length of the safe prime (defaulted to 2048 bits). This is due to the client public value being generated from a private value that is 4 bits below the specification, reducing the protocol's security margin and making it practically exploitable. The server utilizes a full-sized 2048-bit random number to create the shared session key and password proof.

Recommendations Upgrade to version 2.0.1 or later.

Exploit

Fix

Weakness Enumeration

CWE-331

Related Identifiers

CVE-2025-54885

GHSA-8Q6V-474H-WHGG

Affected Products

Thinbus-Srp-Npm

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54885.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-54885 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-8q6v-474h-whgg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-54885 · Security Note
• https://github.com/simbo1905/thinbus-srp-npm/security/advisories/GHSA-8q6v-474h-whgg · Note
• https://github.com/simbo1905/thinbus-srp-npm/pull/30/commits/4aeaea2366e090765a8204059c7bcf3616438d31 · Note
• https://github.com/simbo1905/thinbus-srp-npm/issues/28 · Note
• https://github.com/simbo1905/thinbus-srp-npm/commit/aa7064c1db7294ce867e9bc92f26fa6c71a5a2cb · Note
• https://github.com/simbo1905/thinbus-srp-npm · Note
• https://twitter.com/VulmonFeeds/status/1953311436488278476 · Twitter Post
• https://t.me/CVEtracker/29413 · Telegram Post