Vulnerability · Published May 21, 2020 · Assigned by microsoft

CVE-2020-1065Scripting Engine Memory Corruption Vulnerability

Medium 4.2

In plain English

A medium-severity security flaw in ChakraCore from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 83% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.2Medium

Exploit odds (30 days)2.2%top 17.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
NuGet	microsoft.chakracore	1.11.19	GHSA-9hjg-j983-mqcc

Affected products (as reported)

Vendor	Product	Versions
Microsoft	ChakraCore	0 – before publication
Microsoft	Microsoft Edge (EdgeHTML-based)	1.0..0 – before publication

References

Scripting Engine Memory Corruption Vulnerability vendor-advisory, patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1065 x_refsource_MISC, x_transferred