CVE-2021-46878

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.

Affected packages (1)

• Bitnami/fluent-bit>= 1.7.1, < 1.7.2

CVSS scores

References (3)

• WEBhttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27742
• WEBhttps://github.com/fluent/fluent-bit/pull/3115
• WEBhttps://nvd.nist.gov/vuln/detail/CVE-2021-46878