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CVE-2021-4437— dbartholomae lambda-middleware frameguard JSON Mime-Type JsonDeserializer.ts redos

Quick assessment

Affected
dbartholomae lambda-middleware frameguard
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.

lambda-middleware是AWS lambda 函数的中间件集合。 dbartholomae lambda-middleware frameguard 1.0.4及之前版本存在安全漏洞，该漏洞源于组件JSON Mime-Type Handler存在安全漏洞。

CVSS 3.5 · Low EPSS 0.45% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-4437

Vulnerability Information
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Vulnerability Title
dbartholomae lambda-middleware frameguard JSON Mime-Type JsonDeserializer.ts redos
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as problematic, has been found in dbartholomae lambda-middleware frameguard up to 1.0.4. Affected by this issue is some unknown functionality of the file packages/json-deserializer/src/JsonDeserializer.ts of the component JSON Mime-Type Handler. The manipulation leads to inefficient regular expression complexity. Upgrading to version 1.1.0 is able to address this issue. The patch is identified as f689404d830cbc1edd6a1018d3334ff5f44dc6a6. It is recommended to upgrade the affected component. VDB-253406 is the identifier assigned to this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
lambda-middleware 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lambda-middleware是AWS lambda 函数的中间件集合。 dbartholomae lambda-middleware frameguard 1.0.4及之前版本存在安全漏洞，该漏洞源于组件JSON Mime-Type Handler存在安全漏洞。
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
dbartholomae lambda-middleware frameguard 1.0.0 -

II. Public POCs for CVE-2021-4437

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III. Intelligence Information for CVE-2021-4437

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Patches & Fixes for CVE-2021-4437 (2)

Vendor Advisories for CVE-2021-4437 (2)

Other References for CVE-2021-4437 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1333