Vulnerability Name:

CVE-2021-21127 (CCN-195270)

Assigned:2020-12-21
Published:2021-01-19
Updated:2022-07-12
Summary:Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass content security policy via a crafted Chrome Extension.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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): High
Integrity (I): High
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/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): High
Availibility (A): None
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-Other
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-21127

Source: CCN
Type: Google Chrome Releases Web site
Stable Channel Update for Desktop

Source: MISC
Type: Release Notes, Vendor Advisory
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html

Source: MISC
Type: Exploit, Issue Tracking, Vendor Advisory
https://crbug.com/1115590

Source: XF
Type: UNKNOWN
google-chrome-cve202121127-sec-bypass(195270)

Source: MISC
Type: Third Party Advisory
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21127

Vulnerable Configuration:Configuration 1:
  • cpe:/a:google:chrome:*:*:*:*:*:*:*:* (Version < 88.0.4324.96)
  • OR cpe:/a:microsoft:edge_chromium:*:*:*:*:*:*:*:* (Version < 88.0.705.50)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112066
    P
    		chromedriver-93.0.4577.82-1.1 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:112558
    P
    		libQt5Pdf5-5.15.6-2.1 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:100359
    P
    		 (Important)
    2021-12-06
    oval:org.opensuse.security:def:106045
    P
    		Security update for busybox (Important)
    2021-10-27
    oval:org.opensuse.security:def:105615
    P
    		chromedriver-93.0.4577.82-1.1 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:96406
    P
    		Security update for libqt5-qtwebengine (Important)
    2021-07-09
    oval:org.opensuse.security:def:109753
    P
    		Security update for libqt5-qtwebengine (Important)
    2021-07-09
    oval:org.opensuse.security:def:103096
    P
    		Security update for libqt5-qtwebengine (Important)
    2021-07-09
    oval:org.opensuse.security:def:11096
    P
    		Security update for libqt5-qtwebengine (Important)
    2021-07-09
    oval:org.opensuse.security:def:111478
    P
    		Security update for libqt5-qtwebengine (Important)
    2021-07-05
    oval:org.opensuse.security:def:103131
    P
    		Security update for chromium (Important)
    2021-01-29
    oval:org.opensuse.security:def:96441
    P
    		Security update for chromium (Important)
    2021-01-29
    oval:org.opensuse.security:def:11170
    P
    		Security update for chromium (Important)
    2021-01-29
    oval:org.opensuse.security:def:109788
    P
    		Security update for chromium (Important)
    2021-01-29
    oval:org.opensuse.security:def:107025
    P
    		Security update for chromium (Important)
    2021-01-27
    oval:org.opensuse.security:def:11168
    P
    		Security update for chromium (Important)
    2021-01-27
    oval:org.opensuse.security:def:93646
    P
    		Security update for chromium (Important)
    2021-01-27
    oval:org.opensuse.security:def:111194
    P
    		Security update for chromium (Important)
    2021-01-27
    oval:org.opensuse.security:def:110656
    P
    		Security update for chromium (Important)
    2021-01-26
    BACK
    google chrome *
    microsoft edge chromium *