#VU46905 Buffer overflow in brotli - CVE-2020-8927
Published: September 15, 2020 / Updated: September 22, 2020
Vulnerability identifier: #VU46905
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-8927
CWE-ID: CWE-120
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
brotli
brotli
Software vendor:
Google
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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
Install update from vendor's website.