Critical severity · published Jan 8, 2021
CVE-2021-21111
Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a…
9.6
CVSS
1.1%
EPSS
No
On KEV
Description
Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
Chrome · Google
before 87.0.4280.141 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
FE
Fedora · Fedoraproject
32; 33 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21111
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21111
Release Notes
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop.html
Permissions Required
https://crbug.com/1149125
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWIJKZTZTG6G475OR6PP4WPQBVM6PS/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z6P6AVVFP7B2M4H7TJQBASRZIBLOTUFN/
Third Party Advisory
https://security.gentoo.org/glsa/202101-05
Third Party Advisory
https://www.debian.org/security/2021/dsa-4832
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