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CVE-2021-29469— Potential exponential regex in monitor mode

Quick assessment

Affected
NodeRedis node-redis
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.

node-redis是一个应用软件。一个高性能Node.js Redis客户端。 node-redis 存在安全漏洞，该漏洞源于客户端处于监视模式时，用于检测监视消息的regex开始可能导致某些字符串的指数回溯。会导致拒绝服务。

CVSS 5.3 · Medium EPSS 1.67% · P76

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-29469

Vulnerability Information
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Vulnerability Title
Potential exponential regex in monitor mode
Source: CVE Program / CVE List V5
Vulnerability Description
Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
node-redis 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
node-redis是一个应用软件。一个高性能Node.js Redis客户端。 node-redis 存在安全漏洞，该漏洞源于客户端处于监视模式时，用于检测监视消息的regex开始可能导致某些字符串的指数回溯。会导致拒绝服务。
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
NodeRedis node-redis < 3.1.1 -

II. Public POCs for CVE-2021-29469

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III. Intelligence Information for CVE-2021-29469

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Patches & Fixes for CVE-2021-29469 (1)

Vendor Advisories for CVE-2021-29469 (2)

Other References for CVE-2021-29469 (1)

IV. Related Vulnerabilities

Same vendor: NodeRedis
Same weakness: CWE-400

V. Comments for CVE-2021-29469

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