fluentd vulnerable to remote code execution due to insecure deserialization (in non-default configuration)
### 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. ### Patches v1.15.3 ### Workarounds Do not use `FLUENT_OJ_OPTION_MODE=object`. ### References * GHSL-2022-067
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2022-39379US | critical9.8 | — | ||
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 c… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/fluent/fluentdPACKAGE
- https://github.com/fluent/fluentd/commit/48e5b85dab1b6d4c273090d538fc11b3f2fd8135WEB
- https://github.com/fluent/fluentd/security/advisories/GHSA-fppq-mj76-fpj2WEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd/CVE-2022-39379.ymlWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MYD5QV66OLDHES6IKVYYM3Y3YID3VVCOWEB
- https://nvd.nist.gov/vuln/detail/CVE-2022-39379ADVISORY
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