PT-2024-25302 · Unknown · Lua-Resty-Jwt

Nils Emmerich · Published 2024-04-24 · Updated 2026-03-02 · CVE-2024-33531

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions lua-resty-jwt version 0.2.3

Description The issue allows attackers to bypass all JWT-parsing signature checks by crafting a JWT with an enc header with the value A256GCM. This enables them to potentially access unauthorized resources or perform malicious actions.

Recommendations For lua-resty-jwt version 0.2.3, as a temporary workaround, consider restricting the use of the enc header or validating its value to prevent it from being set to A256GCM until a patch is available. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

CVE-2024-33531

Affected Products

Lua-Resty-Jwt

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2024-33531 · Security Note
• https://osv.dev/vulnerability/CVE-2024-33531 · Vendor Advisory
• https://github.com/cdbattags/lua-resty-jwt/commit/d1558e2afefe868fea1e7e9a4b04ea94ab678a85 · Note
• https://github.com/cdbattags/lua-resty-jwt/issues/61 · Note
• https://t.me/cvenotify/77858 · Telegram Post
• https://insinuator.net/2023/10/lua-resty-jwt-authentication-bypass · Note
• https://twitter.com/cdbattags/status/2028301298609918186 · Twitter Post
• https://twitter.com/cdbattags/status/2028298227519283648 · Twitter Post