CVE-2020-8927
5.3 · MEDIUMOverview
CVE-2020-8927 is a medium-severity vulnerability affecting google brotli. It was published on September 15, 2020 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your Brotli library to 1.0.8 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
Remediation
Check the references section for vendor advisories and patches from google. Update brotli to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| brotli | >= 0, < 1.0.8 | Affected | |
| microsoft | .net | 5.0 | Affected |
| microsoft | .net_core | 3.1 | Affected |
| microsoft | powershell | >= 7.0, < 7.0.9 | Affected |
| microsoft | visual_studio_2019 | 16.0 | Affected |
| microsoft | visual_studio_2022 | 17.0 | Affected |
References
Frequently Asked Questions
What is CVE-2020-8927?
CVE-2020-8927 is a medium-severity vulnerability affecting google brotli. It was published on September 15, 2020 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2020-8927?
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-8927?
Check the references section for vendor advisories and patches from google. Update brotli to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-8927?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-8927 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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