Vulnerability Details : CVE-2020-27777

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.
Published 2020-12-15 17:15:14
Updated 2023-10-05 14:29:58
Source Red Hat, Inc.
View at NVD,   CVE.org

Threat overview for CVE-2020-27777

Top countries where our scanners detected CVE-2020-27777
Top open port discovered on systems with this issue 53
IPs affected by CVE-2020-27777 840,163
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2020-27777!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-27777

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-27777

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.2
 HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
 NIST
6.7
 MEDIUM CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.8
5.9
 NIST

CWE ids for CVE-2020-27777

  • The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
    Assigned by: secalert@redhat.com (Primary)

References for CVE-2020-27777

Products affected by CVE-2020-27777

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