CVE-2020-8927
Publication date 15 September 2020
Last updated 25 August 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| brotli | 20.04 LTS focal |
Fixed 1.0.7-6ubuntu0.1
|
| 18.04 LTS bionic |
Fixed 1.0.3-1ubuntu1.3
|
|
| 16.04 LTS xenial |
Fixed 1.0.3-1ubuntu1~16.04.2
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.5 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-4568-1
- Brotli vulnerability
- 5 October 2020