What is CVE-2022-39379?

CVE-2022-39379 is a low-severity vulnerability in Fluent Fluentd, classified under Deserialization of Untrusted Data. CVSS score: 3.1/10. Published 2022-11-02.

How severe is CVE-2022-39379?

Low severity. CVSS v3 base score is 3.1 out of 10.

Deserialization in Fluent Fluentd

CVE-2022-39379

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`.

Vulnerability class: Insecure Deserialization

EPSS: 0.450 (98.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Fluent Fluentd — versions >= 1.13.2, < 1.15.3
Fluentd
Fedoraproject Fedora — versions 37

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

security-advisories@github.com (Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory)
security-advisories@github.com (vendor-advisory)

Frequently asked questions

What is CVE-2022-39379?: CVE-2022-39379 is a low-severity vulnerability in Fluent Fluentd, classified under Deserialization of Untrusted Data. CVSS score: 3.1/10. Published 2022-11-02.
How severe is CVE-2022-39379?: Low severity. CVSS v3 base score is 3.1 out of 10.