SSRF in Stripe Smokescreen
CVE-2022-29188
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (56.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.000
Affected products
- Stripe Smokescreen — versions < 0.0.4
Weakness classification (CWE)
References
- github.com/stripe/smokescreen/security/advisories/GHSA-qwrf-gfpj-qvj6 (Third Party Advisory)
- github.com/stripe/smokescreen/commit/dea7b3c89df000f4072ff9866d61d78e30df6a36 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-29188?
- CVE-2022-29188 is a medium-severity vulnerability in Stripe Smokescreen, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2022-05-21.
- How severe is CVE-2022-29188?
- Medium severity. CVSS v3 base score is 5.3 out of 10.