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CVE-2022-31013— Authentication bypass in Vartalap chat-server

Quick assessment

Affected
ramank775 chat-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Chat Server是ramank775个人开发者的基于微服务架构的聊天服务器，支持高可用、高吞吐、横向扩展。 Chat Server 2.3.2到2.6.0版本存在输入验证错误漏洞，该漏洞源于应用存在验证访问令牌错误。攻击者利用该漏洞可以实现身份验证绕过。

CVSS 9.1 · Critical EPSS 1.50% · P74

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2022-31013

Vulnerability Information
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Vulnerability Title
Authentication bypass in Vartalap chat-server
Source: CVE Program / CVE List V5
Vulnerability Description
Chat Server is the chat server for Vartalap, an open-source messaging application. Versions 2.3.2 until 2.6.0 suffer from a bug in validating the access token, resulting in authentication bypass. The function `this.authProvider.verifyAccessKey` is an async function, as the code is not using `await` to wait for the verification result. Every time the function responds back with success, along with an unhandled exception if the token is invalid. A patch is available in version 2.6.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Chat Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chat Server是ramank775个人开发者的基于微服务架构的聊天服务器，支持高可用、高吞吐、横向扩展。 Chat Server 2.3.2到2.6.0版本存在输入验证错误漏洞，该漏洞源于应用存在验证访问令牌错误。攻击者利用该漏洞可以实现身份验证绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ramank775 chat-server >= 2.3.2, < 2.6.0 -

II. Public POCs for CVE-2022-31013

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III. Intelligence Information for CVE-2022-31013

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Vendor Advisories for CVE-2022-31013 (1)

Other References for CVE-2022-31013 (2)

IV. Related Vulnerabilities

Same weakness: CWE-287