Vulnerability Name:

CVE-2021-26271 (CCN-195665)

Assigned:2021-01-22
Published:2021-01-22
Updated:2021-12-01
Summary:It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted text into the Styles input of specific dialogs (in the Advanced Tab for Dialogs 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:CWE-829
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-26271

Source: CONFIRM
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-cve202126271-dos(195665)

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

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-26271

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: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: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: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
    BACK
    ckeditor ckeditor *
    oracle agile plm 9.3.5
    oracle agile plm 9.3.6
    oracle application express *
    oracle financial services analytical applications infrastructure *
    oracle financial services analytical applications infrastructure 8.1.0
    oracle financial services analytical applications infrastructure 8.1.1
    oracle jd edwards enterpriseone tools *
    oracle siebel ui framework *
    oracle webcenter sites 12.2.1.3.0
    oracle webcenter sites 12.2.1.4.0
    ckeditor ckeditor 4.0
    ibm sterling b2b integrator 6.0.0.0
    ibm api connect 2018.4.1.0
    ibm sterling b2b integrator 6.1.0.0
    ibm control center 6.2.0.0
    ibm sterling b2b integrator 6.1.1.0