CVE-2021-46879 - Vulnerability Details - OpenCVE

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.

Published: 2023-04-11

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:treasuredata:fluent_bit:1.7.1:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-33529	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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00128.

Exploitation poc

Automatable no

Technical Impact total

References

Link	Providers
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851
https://github.com/fluent/fluent-bit/pull/3100

History

Tue, 11 Feb 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Subscriptions

Treasuredata Fluent Bit

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2023-04-11T00:00:00.000Z

Updated: 2025-02-11T19:56:04.174Z

Reserved: 2023-03-29T00:00:00.000Z

Link: CVE-2021-46879

Vulnrichment

Updated: 2024-08-04T05:17:42.859Z

NVD

Status : Modified

Published: 2023-04-11T18:15:58.387

Modified: 2025-02-11T20:15:31.043

Link: CVE-2021-46879

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-787

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