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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.450 (98.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.450 · newest: 0.450 · change: 0.000
Affected products
- Fluent Fluentd — versions >= 1.13.2, < 1.15.3
- Fluentd
- Fedoraproject Fedora — versions 37
Weakness classification (CWE)
References
- github.com/fluent/fluentd/security/advisories/GHSA-fppq-mj76-fpj2 (Third Party Advisory)
- github.com/fluent/fluentd/commit/48e5b85dab1b6d4c273090d538fc11b3f2fd8135 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (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.