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CVE-2022-29188— Smokescreen SSRF via deny list bypass (square brackets) in Smokescreen

Quick assessment

Affected
stripe smokescreen
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.

Smokescreen是一个 HTTP CONNECT 代理。 Smokescreen 存在代码问题漏洞。攻击者利用该漏洞用方括号将主机名括起来以绕过拒绝列表功能。

CVSS 5.3 · Medium EPSS 0.83% · P55

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-29188

Vulnerability Information
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Vulnerability Title
Smokescreen SSRF via deny list bypass (square brackets) in Smokescreen
Source: CVE Program / CVE List V5
Vulnerability Description
Smokescreen is an HTTP proxy. The primary use case for Smokescreen is to prevent server-side request forgery (SSRF) attacks in which external attackers leverage the behavior of applications to connect to or scan internal infrastructure. Smokescreen also offers an option to deny access to additional (e.g., external) URLs by way of a deny list. There was an issue in Smokescreen that made it possible to bypass the deny list feature by surrounding the hostname with square brackets (e.g. `[example.com]`). This only impacted the HTTP proxy functionality of Smokescreen. HTTPS requests were not impacted. Smokescreen version 0.0.4 contains a patch for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Smokescreen 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Smokescreen是一个 HTTP CONNECT 代理。 Smokescreen 存在代码问题漏洞。攻击者利用该漏洞用方括号将主机名括起来以绕过拒绝列表功能。
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
stripe smokescreen < 0.0.4 -

II. Public POCs for CVE-2022-29188

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III. Intelligence Information for CVE-2022-29188

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Patches & Fixes for CVE-2022-29188 (1)

Vendor Advisories for CVE-2022-29188 (1)

IV. Related Vulnerabilities

Same product: smokescreen
Same vendor: stripe
Same weakness: CWE-918

V. Comments for CVE-2022-29188

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