CVE-2020-35963

HIGH

Fluent Bit < 1.6.4 - Out-of-bounds Write in flb_gzip_compress

Title source: llm
STIX 2.1

Description

flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.

References (3)

Core 3
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261
Release Notes, Vendor Advisory x_refsource_misc
https://fluentbit.io/announcements/v1.6.4/

Scores

CVSS v3 7.8
EPSS 0.0131
EPSS Percentile 67.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (1)
treasuredata/fluent_bit < 1.6.4
Published Jan 03, 2021
Tracked Since Feb 18, 2026