CVE-2022-39379

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CVE-2022-39379

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

Details: 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`.

References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39379.json, https://github.com/fluent/fluentd/security/advisories/GHSA-fppq-mj76-fpj2, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYD5QV66OLDHES6IKVYYM3Y3YID3VVCO/, https://nvd.nist.gov/vuln/detail/CVE-2022-39379, https://github.com/fluent/fluentd/commit/48e5b85dab1b6d4c273090d538fc11b3f2fd8135