CVE-2022-29188 : Smokescreen is an HTTP proxy. The primary use case for Smokescreen is to prevent

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.

Published 2022-05-21 00:15:11

Updated 2022-06-07 21:23:47

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Server-side request forgery (SSRF)

Products affected by CVE-2022-29188

Stripe » Smokescreen
Versions before (<) 0.0.4
cpe:2.3:a:stripe:smokescreen:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2022-29188

EPSS FAQ

0.09%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 22 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-29188

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.4	MEDIUM	AV:N/AC:L/Au:N/C:P/I:P/A:N	10.0	4.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	3.9	2.5	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: Low Availability: None
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	3.9	1.4	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: None Availability: None

CWE ids for CVE-2022-29188

CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2022-29188

https://github.com/stripe/smokescreen/commit/dea7b3c89df000f4072ff9866d61d78e30df6a36

Fix hostname parsing for square brackets · stripe/smokescreen@dea7b3c · GitHub
Patch;Third Party Advisory
https://github.com/stripe/smokescreen/security/advisories/GHSA-qwrf-gfpj-qvj6

Smokescreen SSRF via deny list bypass (square brackets) · Advisory · stripe/smokescreen · GitHub
Third Party Advisory

Jump to

Vulnerability Details : CVE-2022-29188

Products affected by CVE-2022-29188

Exploit prediction scoring system (EPSS) score for CVE-2022-29188

CVSS scores for CVE-2022-29188

CWE ids for CVE-2022-29188

References for CVE-2022-29188