CVE-2020-27777

CVSS V2 High 7.2 CVSS V3 Medium 6.7
Description
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.
Overview
  • CVE ID
  • CVE-2020-27777
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-12-15T17:15:14
  • Last Modified Date
  • 2020-12-22T17:18:55
Weakness Enumerations
CWE URL
CWE-862 http://cwe.mitre.org/data/definitions/862.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 5.10.0
cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.2
  • Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 6.7
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 0.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=bd59380c5ba4147dcbaad3e582b55ccfd120b764 Exploit Patch Vendor Advisory
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 Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1900844 Issue Tracking Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-27777
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27777
History
Created Old Value New Value Data Type Notes
2022-05-10 07:29:39 Added to TrackCVE
2022-12-05 18:21:33 2020-12-15T17:15Z 2020-12-15T17:15:14 CVE Published Date updated
2022-12-05 18:21:33 2020-12-22T17:18:55 CVE Modified Date updated
2022-12-05 18:21:33 Analyzed Vulnerability Status updated