CVE Vulnerability

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.

7.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

6.7 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=bd59380c5ba4147dcbaad3e582b55ccfd120b764 Exploit Patch
https://www.openwall.com/lists/oss-security/2020/11/23/2 Mailing List Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/10/09/1 Exploit Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1900844 Issue Tracking Patch
Configurations

Configuration 1

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:*
Information

Published : 2020-12-15 05:15

Updated : 2020-12-22 05:18

NVD link : CVE-2020-27777

Mitre link : CVE-2020-27777

Products Affected

Openshift Container Platform

Redhat

CWE
CWE-862