Buffer overflow in Microsoft Chakracore

CVE-2020-1057

<p>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.</p> <p>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.</p> <p>The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.</p>

Vulnerability class: Buffer Overflow

EPSS: 0.021 (79.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-1057?
CVE-2020-1057 is a medium-severity vulnerability in Microsoft Chakracore, classified under Out-of-bounds Write. CVSS score: 4.2/10. Published 2020-09-11.
How severe is CVE-2020-1057?
Medium severity. CVSS v3 base score is 4.2 out of 10.
Is CVE-2020-1057 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.