Vulnerability CVE-2021-26272 - CERT Civis.Net

Vulnerability Name:

CVE-2021-26272 (CCN-195667)

Assigned:

2021-01-22

Published:

2021-01-22

Updated:

2022-03-01

Summary:

It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).

CVSS v3 Severity:

6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2021-26272

Source: MISC
Type: Vendor Advisory
https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first

Source: XF
Type: UNKNOWN
ckeditor-cve202126272-dos(195667)

Source: CCN
Type: CKEditor 4 GIT Repository
CKEditor 4 Changelog

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416

Source: CCN
Type: IBM Security Bulletin 6453469 (Control Center)
Multiple CKEditor Vulnerabilities Affect IBM Control Center

Source: CCN
Type: IBM Security Bulletin 6483707 (API Connect)
IBM API Connect is impacted by vulnerabilities in Drupal CKEditor (CVE-2021-26271, CVE-2021-26272)

Source: CCN
Type: IBM Security Bulletin 6558534 (Global High Availability Mailbox)
IBM Sterling Global Mailbox is vulnerable to denial of service due to CKeditor WYSIWYG editor (CVE-2021-26271, CVE-2021-26272)

Source: CCN
Type: IBM Security Bulletin 6570971 (Sterling B2B Integrator)
IBM Sterling B2B Integrator vulnerable to multiple vulnerabilities due to CKEditor

Source: N/A
Type: Patch, Third Party Advisory
N/A

Source: MISC
Type: Not Applicable, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html

Source: CCN
Type: Oracle CPUJul2021
Oracle Critical Patch Update Advisory - July 2021

Source: CCN
Type: Oracle CPUOct2021
Oracle Critical Patch Update Advisory - October 2021

Source: MISC
Type: Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-26272

Vulnerable Configuration:

Configuration 1:

cpe:/a:ckeditor:ckeditor:*:*:*:*:*:*:*:* (Version >= 4.0 and < 4.16)

Configuration 2:

cpe:/a:oracle:agile_plm:9.3.5:*:*:*:*:*:*:*

OR cpe:/a:oracle:agile_plm:9.3.6:*:*:*:*:*:*:*

OR cpe:/a:oracle:application_express:*:*:*:*:*:*:*:* (Version < 21.1.0)

OR cpe:/a:oracle:banking_party_management:2.7.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:commerce_merchandising:11.1.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:commerce_merchandising:11.2.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:commerce_merchandising:*:*:*:*:*:*:*:* (Version >= 11.3.0 and <= 11.3.2)

OR cpe:/a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:* (Version >= 8.0.6 and <= 8.0.9)

OR cpe:/a:oracle:financial_services_analytical_applications_infrastructure:8.1.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:financial_services_analytical_applications_infrastructure:8.1.1:*:*:*:*:*:*:*

OR cpe:/a:oracle:financial_services_model_management_and_governance:*:*:*:*:*:*:*:* (Version >= 8.0.8.0.0 and <= 8.1.0.0.0)

OR cpe:/a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:* (Version < 9.2.6.0)

OR cpe:/a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:* (Version <= 21.9)

OR cpe:/a:oracle:webcenter_sites:12.2.1.3.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:webcenter_sites:12.2.1.4.0:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:ckeditor:ckeditor:4.0:*:*:*:*:*:*:*

AND

cpe:/a:oracle:agile_plm_framework:9.3.5:*:*:*:*:*:*:*

OR cpe:/a:oracle:agile_plm_framework:9.3.6:*:*:*:*:*:*:*

OR cpe:/a:oracle:webcenter_sites:12.2.1.3.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:sterling_b2b_integrator:6.0.0.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:api_connect:2018.4.1.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:sterling_b2b_integrator:6.1.0.0:*:*:*:standard:*:*:*

OR cpe:/a:ibm:control_center:6.2.0.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:sterling_b2b_integrator:6.1.1.0:*:*:*:standard:*:*:*

Denotes that component is vulnerable