Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1xd3JmLWdmcGotcXZqNs4AArBB

Smokescreen SSRF via deny list bypass (square brackets)

Impact

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]).

Recommendation

Upgrade Smokescreen to version 0.0.4 or later.

Acknowledgements

Thanks to Axel Chong for reporting the issue.

For more information

Email us at [email protected]

Permalink: https://github.com/advisories/GHSA-qwrf-gfpj-qvj6
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1xd3JmLWdmcGotcXZqNs4AArBB
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: almost 2 years ago
Updated: over 1 year ago

CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Identifiers: GHSA-qwrf-gfpj-qvj6, CVE-2022-29188
References:

• https://github.com/stripe/smokescreen/security/advisories/GHSA-qwrf-gfpj-qvj6
• https://nvd.nist.gov/vuln/detail/CVE-2022-29188
• https://github.com/stripe/smokescreen/commit/dea7b3c89df000f4072ff9866d61d78e30df6a36
• https://github.com/advisories/GHSA-qwrf-gfpj-qvj6

Repository: https://github.com/stripe/smokescreen
Blast Radius: 1.6

Affected Packages