CVE-2021-46878

An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flb_pack_msgpack_to_json_format leads to type confusion bug that interprets whatever is on the stack as msgpack maps and arrays, leading to use-after-free. This can be used by an attacker to craft a specially craft file and trick the victim opening it using the affect software, triggering use-after-free 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=27742	Exploit Issue Tracking Patch Third Party Advisory
https://github.com/fluent/fluent-bit/pull/3115	Patch
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27742	Exploit Issue Tracking Patch Third Party Advisory
https://github.com/fluent/fluent-bit/pull/3115	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=27742 - Exploit, Issue Tracking, Patch, Third Party Advisory~~	() https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27742 - Exploit, Issue Tracking, Patch, Third Party Advisory
References	~~() https://github.com/fluent/fluent-bit/pull/3115 - Patch~~	() https://github.com/fluent/fluent-bit/pull/3115 - Patch

26 Apr 2023, 13:42

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-04-11 18:15

Updated : 2025-02-11 21:15

NVD link : CVE-2021-46878

Mitre link : CVE-2021-46878

CVE.ORG link : CVE-2021-46878

JSON object : View

Products Affected

treasuredata

fluent_bit

CWE

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

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