CVE-2021-21139: Inappropriate implementation in iframe sandbox

Reference Links

• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html (Advisory)
• https://crbug.com/937131
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21139

Parent vulnerabilities

(Appears in the following advisories)

• 8963246051762193641

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2021-21117
• CVE-2021-21118
• CVE-2021-21119
• CVE-2021-21120
• CVE-2021-21121
• CVE-2021-21122
• CVE-2021-21123
• CVE-2021-21124
• CVE-2021-21125
• CVE-2020-16044
• CVE-2021-21126
• CVE-2021-21127
• CVE-2021-21128
• CVE-2021-21129
• CVE-2021-21130
• CVE-2021-21131
• CVE-2021-21132
• CVE-2021-21133
• CVE-2021-21134
• CVE-2021-21135
• CVE-2021-21136
• CVE-2021-21137
• CVE-2021-21138
• CVE-2021-21140
• CVE-2021-21141

Frequently Asked Questions

• What is the severity of CVE-2021-21139?

  CVE-2021-21139 has a high severity rating due to its potential to allow remote attackers to bypass navigation restrictions.

• How do I fix CVE-2021-21139?

  To fix CVE-2021-21139, update Google Chrome to version 88.0.4324.96 or later.

• Which versions of Chrome and Edge Chromium are affected by CVE-2021-21139?

  CVE-2021-21139 affects Google Chrome versions prior to 88.0.4324.96 and Microsoft Edge Chromium versions prior to 88.0.705.50.

• What kind of attack can be conducted using CVE-2021-21139?

  An attacker can exploit CVE-2021-21139 to bypass navigation restrictions through a crafted HTML page.

• Is CVE-2021-21139 related to any specific browser functionality?

  CVE-2021-21139 is associated with an inappropriate implementation in the iframe sandbox feature of Google Chrome.