CVE-2021-21159: 
vulnerability analysis and mitigation

CVE-2021-21159 is a heap buffer overflow vulnerability discovered in the TabStrip component of Google Chrome versions prior to 89.0.4389.72. The vulnerability was reported by Khalil Zhani on January 27, 2021, and was fixed with the release of Chrome version 89.0.4389.72 (Chrome Release).

The vulnerability is classified as a heap buffer overflow in the TabStrip component of Chrome. It received a CVSS v3.1 base score of 8.8 (High), with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The vulnerability could be exploited through a crafted HTML page, requiring user interaction (NVD).

If successfully exploited, this vulnerability could allow a remote attacker to potentially exploit heap corruption, which could lead to arbitrary code execution within the context of the browser. The high CVSS score indicates potential severe impacts on confidentiality, integrity, and availability of the system (NVD).

The vulnerability requires user interaction and can be exploited remotely through a crafted HTML page. The attacker does not need any privileges or complex attack conditions to exploit this vulnerability, making it relatively straightforward to exploit if a user can be convinced to visit a malicious webpage (NVD).

The vulnerability was patched in Chrome version 89.0.4389.72. Users and administrators should upgrade to this version or later to mitigate the risk. Various Linux distributions have also released security updates, including Debian (89.0.4389.114-1~deb10u1), Fedora, and Ubuntu (Debian Security, Gentoo Security).