fluentd vulnerable to remote code execution due to insecure deserialization (in non-default configuration)

2022-11-0218:15:35

CWE-502

GitHub Advisory Database

github.com

fluentd

remote code execution

insecure deserialization

non-default configuration

unauthenticated attackers

arbitrary code

json payloads

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

0.024 Low

EPSS

Percentile

90.1%

JSON

Impact

A remote code execution (RCE) vulnerability in non-default configurations of Fluentd allows unauthenticated attackers to execute arbitrary code via specially crafted JSON payloads.

Fluentd setups are only affected if the environment variable FLUENT_OJ_OPTION_MODE is explicitly set to object.

Please note: The option FLUENT_OJ_OPTION_MODE was introduced in Fluentd version 1.13.2. Earlier versions of Fluentd are not affected by this vulnerability.