Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Brotli | < 1.0.8 | |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 31 |
| Canonical | Ubuntu Linux | 16.04 |
| Opensuse | Leap | 15.2 |
| Microsoft | .Net | >= 5.0, <= 5.0.14 |
| Microsoft | .Net Core | >= 3.1, <= 3.1.22 |
| Microsoft | Powershell | >= 7.0, < 7.0.9 |
| Microsoft | Visual Studio 2019 | >= 16.0, <= 16.11 |
| Microsoft | Visual Studio 2022 | >= 17.0, <= 17.0.7 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00108.htmlMailing ListThird Party Advisory
- https://github.com/google/brotli/releases/tag/v1.0.9Release NotesThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00003.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4568-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4801Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00108.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2020-8927?
CVE-2020-8927 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 happe...
How severe is CVE-2020-8927?
CVE-2020-8927 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-8927?
Check the references section above for vendor advisories and patch information. Affected products include: Google Brotli, Debian Debian Linux, Fedoraproject Fedora, Canonical Ubuntu Linux, Opensuse Leap.