PT-2021-18227 · Unknown · Grassroot Platform

Published 2021-04-19 · Updated 2021-04-28 · CVE-2021-29455

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Grassroot Platform versions prior to 1.3.1

Description: The issue concerns the improper verification of the signature of JSON Web Tokens (JWT) when refreshing an existing JWT, allowing for the forgery of a valid JWT. This problem has been resolved by deprecating the JWT refresh function in the fixed version.

Recommendations: For versions prior to 1.3.1, update to version 1.3.1 or later, which deprecates the JWT refresh function to prevent the forgery of valid JWTs. As a temporary workaround, consider disabling the JWT refresh function until the update can be applied.

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2021-29455

GHSA-F65W-6XW8-6734

Affected Products

Grassroot Platform

References · 5

• https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-29455 · Security Note
• https://osv.dev/vulnerability/CVE-2021-29455 · Vendor Advisory
• https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734 · Note
• https://github.com/grassrootza/grassroot-platform · Note