CVE-2020-35963

HIGH EPSS 67.0%
Published Jan 3, 20215y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Jan 3, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
67.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
treasuredatafluent_bit* <1.6.4
linuxlinux_kernel*any

References 3

  • bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261
    ExploitIssue TrackingThird Party Advisory
  • fluentbit.io https://fluentbit.io/announcements/v1.6.4/
    Release NotesVendor Advisory
  • github.com https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af
    PatchThird Party Advisory