CVE-2021-46879

HIGH EPSS 29.9%
Published Apr 11, 20233y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 11, 2023 3y ago
Last Modified Jun 17, 2026 2w ago

Description

An issue was discovered in Treasure Data Fluent Bit 1.7.1, a wrong variable is used to get the msgpack data resulting in a heap overflow in flb_msgpack_gelf_value_ext. An attacker can craft a malicious file and tick the victim to open the file with the software, triggering a heap overflow and execute arbitrary code on the target system.

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
29.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 1

VendorProductVersionRange
treasuredatafluent_bit1.7.1any

References 2

  • bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/fluent/fluent-bit/pull/3100
    Patch

Remediation

  • bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/fluent/fluent-bit/pull/3100
    Patch