CVE-2020-16042: 
Node.js vulnerability analysis and mitigation

Uninitialized Use in V8 in Google Chrome prior to version 87.0.4280.88 was discovered, identified as CVE-2020-16042. The vulnerability allowed remote attackers to obtain potentially sensitive information from process memory through a crafted HTML page. The issue was discovered and reported on November 23, 2020, and was patched in December 2020 (Chrome Release).

The vulnerability occurred when performing operations on BigInt values, specifically during right-shift operations where the backing store was not properly cleared, allowing uninitialized memory to be exposed. The vulnerability has been assigned a CVSS 3.1 base score of 6.5 (Medium), with attack vector being network-based, low attack complexity, requiring no privileges but needing user interaction (Mozilla Advisory).

The vulnerability could allow attackers to access potentially sensitive information from process memory, leading to information disclosure. The scope was limited to unauthorized access to memory contents, with no reported impact on system integrity or availability (NVD).

The vulnerability requires user interaction and can be exploited through a crafted HTML page. The attack vector is network-based with low attack complexity, making it relatively straightforward to exploit if a user can be convinced to visit a malicious webpage (Ubuntu CVE).

The vulnerability was fixed in Google Chrome version 87.0.4280.88. Users are advised to update their Chrome browsers to this version or later. The fix was also implemented in Firefox 84 and Firefox ESR 78.6, as well as Thunderbird email client (Mozilla Advisory).