CVE-2021-46878 — Type Confusion in Fluent BIT

CWE-843 — Type Confusion3 documents3 sources
Severity
7.8HIGHNVD
EPSS
0.1%
top 67.85%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Treasuredata Fluent BITMsrc CBL Mariner 1.0 ARMMsrc CBL Mariner 1.0 X64+1 more
Timeline
PublishedApr 11

Description

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 vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

Patches

Patch: bugs.chromium.org ↗Patch: github.com ↗Patch: bugs.chromium.org ↗

🔴Vulnerability Details

1
GHSA
GHSA-r3hq-4h29-qfq9: An issue was discovered in Treasure Data Fluent Bit 1↗2023-04-11
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📋Vendor Advisories

1
Microsoft
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 ↗2023-04-11
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CVE-2021-46878 — Type Confusion in Fluent BIT | cvebase