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Vulnerability Details :

CVE-2021-41186

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-29 Oct, 2021 | 13:40
Updated At-04 Aug, 2024 | 03:08
Rejected At-
Credits

ReDoS vulnerability in parser_apache2

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).

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:29 Oct, 2021 | 13:40
Updated At:04 Aug, 2024 | 03:08
Rejected At:
▼CVE Numbering Authority (CNA)
ReDoS vulnerability in parser_apache2

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).

Affected Products
Vendor
fluent
Product
fluentd
Versions
Affected
  • >= 0.14.14, < 1.14.2
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
3.15.9MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
x_refsource_CONFIRM
https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
x_refsource_MISC
https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
x_refsource_MISC
Hyperlink: https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
Resource:
x_refsource_MISC
Hyperlink: https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
x_refsource_CONFIRM
x_transferred
https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
x_refsource_MISC
x_transferred
https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:29 Oct, 2021 | 14:15
Updated At:03 Nov, 2021 | 00:11

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).

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Secondary3.15.9MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary2.05.0MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Primary
Version: 2.0
Base score: 5.0
Base severity: MEDIUM
Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
CPE Matches
fluentd
fluentd
>>fluentd>>Versions from 0.14.14(inclusive) to 1.14.1(inclusive)
cpe:2.3:a:fluentd:fluentd:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-400Primarysecurity-advisories@github.com
CWE ID: CWE-400
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142security-advisories@github.com
Release Notes
Third Party Advisory
https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662security-advisories@github.com
Third Party Advisory
https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.mdsecurity-advisories@github.com
Broken Link
Hyperlink: https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
Source: security-advisories@github.com
Resource:
Release Notes
Third Party Advisory
Hyperlink: https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
Source: security-advisories@github.com
Resource:
Third Party Advisory
Hyperlink: https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
Source: security-advisories@github.com
Resource:
Broken Link

Change History

0
Information is not available yet

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