CVE-2021-21111: Insufficient policy enforcement in WebUI

Reference Links

• https://security-tracker.debian.org/tracker/CVE-2021-21111
• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop.html (Advisory)
• https://crbug.com/1149125
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VVUWIJKZTZTG6G475OR6PP4WPQBVM6PS/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z6P6AVVFP7B2M4H7TJQBASRZIBLOTUFN/
• https://security.gentoo.org/glsa/202101-05
• https://www.debian.org/security/2021/dsa-4832
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWIJKZTZTG6G475OR6PP4WPQBVM6PS/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z6P6AVVFP7B2M4H7TJQBASRZIBLOTUFN/

Parent vulnerabilities

(Appears in the following advisories)

• 9088041325007791220

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2021-21106
• CVE-2021-21107
• CVE-2021-21108
• CVE-2021-21109
• CVE-2021-21110
• CVE-2021-21112
• CVE-2021-21113
• CVE-2020-16043
• CVE-2021-21114
• CVE-2020-15995
• CVE-2021-21115
• CVE-2021-21116

Frequently Asked Questions

• What is the severity of CVE-2021-21111?

  The severity of CVE-2021-21111 is considered high due to the potential for a sandbox escape via malicious Chrome extensions.

• How do I fix CVE-2021-21111?

  To fix CVE-2021-21111, users should update Google Chrome to version 87.0.4280.141 or later.

• Which versions of Chrome are affected by CVE-2021-21111?

  CVE-2021-21111 affects Google Chrome versions prior to 87.0.4280.141.

• Can CVE-2021-21111 be exploited remotely?

  Yes, an attacker could exploit CVE-2021-21111 remotely by convincing a user to install a malicious Chrome extension.

• Is CVE-2021-21111 present in Chromium projects?

  CVE-2021-21111 affects certain versions of Chromium, specifically earlier than version 90.0.4430.212.