CVE-2022-39379

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

Description

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`.

Category

3.1
CVSS
Severity: Low
CVSS 3.1 •
EPSS 7.35% Top 10%
Vendor Advisory fedoraproject.org
Affected: fluent fluentd
Published at:
Updated at:

References

Link Tags
https://github.com/fluent/fluentd/security/advisories/GHSA-fppq-mj76-fpj2 third party advisory
https://github.com/fluent/fluentd/commit/48e5b85dab1b6d4c273090d538fc11b3f2fd8135 third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYD5QV66OLDHES6IKVYYM3Y3YID3VVCO/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-39379?
CVE-2022-39379 has been scored as a low severity vulnerability.
How to fix CVE-2022-39379?
To fix CVE-2022-39379, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-39379 being actively exploited in the wild?
It is possible that CVE-2022-39379 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-39379?
CVE-2022-39379 affects fluent fluentd.
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