PT-2023-19302 · Unknown · Reason-Jose

Nankeen · Published 2023-02-01 · Updated 2023-02-08 · CVE-2023-23928

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions reason-jose versions prior to 0.8.2

Description The issue affects the Jose.Jws.validate function, which does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks, potentially exposing applications to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation.

Recommendations For versions prior to 0.8.2, update to version 0.8.2 to resolve the issue. As a temporary workaround, consider implementing additional checks for HS256 signatures to prevent tampering of JWS header and payload data. Restrict access to sensitive applications relying on JWS claims assertion to minimize the risk of exploitation.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2023-23928

GHSA-7JJ9-6QWV-WPM7

Affected Products

Reason-Jose

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23928.json · Exploit
• https://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5 · Patch
• https://osv.dev/vulnerability/CVE-2023-23928 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-23928 · Security Note
• https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7 · Note
• https://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2 · Note
• https://t.me/cibsecurity/57237 · Telegram Post