Smokescreen SSRF via deny list bypass
CVE-2022-24825

5.8MEDIUM

Key Information:

Vendor

Stripe

Status
Smokescreen
Vendor
CVE Published:
19 April 2022

What is CVE-2022-24825?

Smokescreen is a simple HTTP proxy that fogs over naughty URLs. 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 appending a dot to the end of user-supplied URLs, or by providing input in a different letter case. Recommended to upgrade Smokescreen to version 0.0.3 or later.

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Deploy the Patch

Affected Version(s)

smokescreen < 0.0.3

References

https://github.com/stripe/smokescreen/security/advisories...
x_refsource_CONFIRM
https://github.com/stripe/smokescreen
x_refsource_MISC

CVSS V3.1

Score:
5.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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