CVE-2018-1000518: websockets is vulnerable to denial of service by memory exhaustion

September 17, 2018 (updated November 19, 2024)

The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0

References

github.com/aaugustin/websockets
github.com/aaugustin/websockets/pull/407
github.com/advisories/GHSA-6g87-ff9q-v847
github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml
nvd.nist.gov/vuln/detail/CVE-2018-1000518

Detect and mitigate CVE-2018-1000518 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →