CVE-2020-27777 (Medium) detected in linux-stable-rtv4.1.33

[mend-bolt-for-github[bot]]

CVE-2020-27777 - Medium Severity Vulnerability

Vulnerable Library - linux-stable-rtv4.1.33

Julia Cartwright's fork of linux-stable-rt.git

Library home page: https://git.kernel.org/pub/scm/linux/kernel/git/julia/linux-stable-rt.git

Found in HEAD commit: 7c0b143b43394df131d83e9aecb3c5518edc127a

Found in base branch: master

Vulnerable Source Files (2)

/arch/powerpc/kernel/rtas.c /arch/powerpc/kernel/rtas.c

Vulnerability Details

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.

Publish Date: 2020-12-15

URL: CVE-2020-27777

CVSS 3 Score Details (6.7)

Base Score Metrics: - Exploitability Metrics: - Attack Vector: Local - Attack Complexity: Low - Privileges Required: High - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://www.linuxkernelcves.com/cves/CVE-2020-27777

Release Date: 2020-12-15

Fix Resolution: v4.14.204, v4.19.155, v5.4.75, v5.9.5,v5.10-rc1

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[mend-bolt-for-github[bot]]

:information_source: This issue was automatically re-opened by Mend because the vulnerable library in the specific branch(es) has been detected in the Mend inventory.