PT-2020-5949 · Microsoft+4 · Edge+4

Tom Van Goethem · Published 2020-10-29 · Updated 2024-06-15 · CVE-2021-21209

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Google Chrome versions prior to 90.0.4430.72 Microsoft Edge (affected versions not specified)

Description: The issue is related to an inappropriate implementation in storage, allowing a remote attacker to leak cross-origin data via a crafted HTML page. This is due to a poorly implemented security check for standard elements. Exploitation of the issue may allow an attacker to gain unauthorized access to protected information using a specially crafted web page.

Recommendations: For Google Chrome versions prior to 90.0.4430.72, update to version 90.0.4430.72 or later to resolve the issue. For Microsoft Edge, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improperly Implemented Security Check for Standard

Origin Validation Error

Weakness Enumeration

CWE-358

CWE-346

Related Identifiers

ALT-PU-2021-1667

ALT-PU-2021-1972

ALT-PU-2021-2007

ALT-PU-2021-2009

ALT-PU-2021-2141

BDU:2021-02093

CVE-2021-21209

DSA-4906-1

OPENSUSE-SU-2021:0629-1

OPENSUSE-SU-2021_0629-1

OPENSUSE-SU-2024:10681-1

OPENSUSE-SU-2024:12948-1

Affected Products

Alt Linux

Astra Linux

Google Chrome

Edge

Suse

References · 2345

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/browser/chrome_cve_2021_21220_v8_insufficient_validation.rb · Exploit
• 🔥 https://github.com/xmzyshypnc/CVE-2021-30551 · Exploit
• 🔥 https://github.com/security-dbg/CVE-2021-21220 · Exploit
• 🔥❌ https://github.com/ohnonoyesyes/CVE-2021-21224 · Exploit, Deleted
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4906-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0629-1 · Vendor Advisory
• https://debian.org/security/2021/dsa-4906 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-02093 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21209 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-21209 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-21209 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2024:10681-1 · Vendor Advisory