CVE-2021-46879

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851	Exploit Issue Tracking Patch Third Party Advisory
https://github.com/fluent/fluent-bit/pull/3100	Patch
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851	Exploit Issue Tracking Patch Third Party Advisory
https://github.com/fluent/fluent-bit/pull/3100	Patch

Configurations

Configuration 1 (hide)

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

History

21 Nov 2024, 06:34

Type	Values Removed	Values Added
References	~~() https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851 - Exploit, Issue Tracking, Patch, Third Party Advisory~~	() https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851 - Exploit, Issue Tracking, Patch, Third Party Advisory
References	~~() https://github.com/fluent/fluent-bit/pull/3100 - Patch~~	() https://github.com/fluent/fluent-bit/pull/3100 - Patch

26 Apr 2023, 13:46

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-04-11 18:15

Updated : 2025-02-11 20:15

NVD link : CVE-2021-46879

Mitre link : CVE-2021-46879

CVE.ORG link : CVE-2021-46879

JSON object : View

Products Affected

treasuredata

fluent_bit

CWE

CWE-787

Out-of-bounds Write

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