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CVE-2021-29495— Nim stdlib httpClient does not validate peer certificates by default

Quick assessment

Affected
nim-lang security
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.

Nim是Nim社区的一种静态类型的编程语言。 Nim 1.4.2之前版本存在安全漏洞，该漏洞源于httpClient SSL TLS证书验证默认是禁用的。

CVSS 5.9 · Medium EPSS 0.49% · P42

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2021-29495

Vulnerability Information
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Vulnerability Title
Nim stdlib httpClient does not validate peer certificates by default
Source: CVE Program / CVE List V5
Vulnerability Description
Nim is a statically typed compiled systems programming language. In Nim standard library before 1.4.2, httpClient SSL/TLS certificate verification was disabled by default. Users can upgrade to version 1.4.2 to receive a patch or, as a workaround, set "verifyMode = CVerifyPeer" as documented.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nim 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nim是Nim社区的一种静态类型的编程语言。 Nim 1.4.2之前版本存在安全漏洞，该漏洞源于httpClient SSL TLS证书验证默认是禁用的。
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
nim-lang security < 1.4.2 -

II. Public POCs for CVE-2021-29495

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III. Intelligence Information for CVE-2021-29495

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Vendor Advisories for CVE-2021-29495 (1)

IV. Related Vulnerabilities

Same product: security
Same vendor: nim-lang
Same weakness: CWE-295