Detections
Analytics

SCA: security update for fluentd (GHSA-hwhf-64mh-r662)

high Tenable Cloud Security Plugin ID 415988

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Fluentd collects events from various data sources and writes them to files to help unify logging
 infrastructure. The parser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression
 denial of service (ReDoS) vulnerability. A broken apache log with a certain pattern of string can spend
 too much time in a regular expression, resulting in the potential for a DoS attack. This issue is patched
 in version 1.14.2 There are two workarounds available. Either don't use parser_apache2 for parsing logs
 (which cannot guarantee generated by Apache), or put patched version of parser_apache2.rb into
 /etc/fluent/plugin directory (or any other directories specified by the environment variable
 `FLUENT_PLUGIN` or `--plugin` option of fluentd). (CVE-2021-41186)

See Also

https://github.com/advisories/GHSA-hwhf-64mh-r662

Plugin Details

Severity: High

ID: 415988

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/6/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.15

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-41186

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/1/2021

Vulnerability Publication Date: 10/29/2021

Reference Information

CVE: CVE-2021-41186

cwe: CWE-400