Fluentd vulnerable to remote code execution due to insecure deserialization (in non-default configuration)
CVE-2022-39379

3.1LOW

Key Information:

Vendor

Fluent

Status
Fluentd
Vendor
CVE Published:
2 November 2022

What is 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.

Affected Version(s)

fluentd >= 1.13.2, < 1.15.3

References

https://github.com/fluent/fluentd/security/advisories/GHS...
https://github.com/fluent/fluentd/commit/48e5b85dab1b6d4c...
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
3.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2022-39379 : Fluentd vulnerable to remote code execution due to insecure deserialization (in non-default configuration)