What is CVE-2020-27383?

CVE-2020-27383 is a high-severity vulnerability in Blizzard Battle.net, classified under Improper Preservation of Permissions. CVSS score: 7.8/10. Published 2021-06-09.

How severe is CVE-2020-27383?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-27383 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Blizzard Battle.net

CVE-2020-27383

Battle.net.exe in Battle.Net 1.27.1.12428 suffers from an elevation of privileges vulnerability which can be used by an "Authenticated User" to modify the existing executable file with a binary of his choice. The vulnerability exist due to weak set of permissions being granted to the "Authenticated Users Group" which grants the (F) Flag aka "Full Control"

EPSS: 0.003 (24.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Blizzard Battle.net — versions 1.27.1.12428
N/a — versions n/a

Weakness classification (CWE)

CWE-281 — Improper Preservation of Permissions

Public proof-of-concept exploits

n0-traces/cve_

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-27383?: CVE-2020-27383 is a high-severity vulnerability in Blizzard Battle.net, classified under Improper Preservation of Permissions. CVSS score: 7.8/10. Published 2021-06-09.
How severe is CVE-2020-27383?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-27383 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.