CVE-2022-39379 Fluentd vulnerable to remote code execution due to insecure deserialization (in non-default configuration)

2022-11-0200:00:00

CWE-502

GitHub_M

www.cve.org

fluentd

remote code execution

deserialization

unauthenticated attackers

json payloads

environment variable

patch

vulnerability

3.1 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

10 High

AI Score

Confidence

High

0.024 Low

EPSS

Percentile

90.1%

JSON

Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. 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. This issue was patched in version 1.15.3. As a workaround do not use FLUENT_OJ_OPTION_MODE=object.

CNA Affected

[
  {
    "vendor": "fluent",
    "product": "fluentd",
    "versions": [
      {
        "version": ">= 1.13.2, < 1.15.3",
        "status": "affected"
      }
    ]
  }
]