CVE-2020-27777HIGH
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.
References
https://bugzilla.redhat.com/show_bug.cgi?id=1900844
Details
Source: MITRE
Published: 2020-12-15
Updated: 2020-12-22
Type: CWE-862
Risk Information
CVSS v2.0
Base Score: 7.2
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.9
Severity: HIGH
CVSS v3.0
Base Score: 6.7
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 0.8
Severity: MEDIUM
Vulnerable Software
Configuration 1
OR
Configuration 2
OR
cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 148041 | EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-1684) | Nessus | Huawei Local Security Checks | high |
| 147978 | Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4751-1) | Nessus | Ubuntu Local Security Checks | high |
| 147690 | EulerOS : kernel (EulerOS-SA-2021-1642) | Nessus | Huawei Local Security Checks | high |
| 147512 | EulerOS : kernel (EulerOS-SA-2021-1604) | Nessus | Huawei Local Security Checks | high |
| 146701 | EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-1311) | Nessus | Huawei Local Security Checks | high |
| 146511 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0452-1) | Nessus | SuSE Local Security Checks | high |
| 146476 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0437-1) | Nessus | SuSE Local Security Checks | high |
| 146474 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0438-1) | Nessus | SuSE Local Security Checks | high |
| 146470 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0434-1) | Nessus | SuSE Local Security Checks | high |
| 146282 | openSUSE Security Update : RT kernel (openSUSE-2021-242) | Nessus | SuSE Local Security Checks | high |
| 145510 | Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4708-1) | Nessus | Ubuntu Local Security Checks | high |
| 145320 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-60) | Nessus | SuSE Local Security Checks | high |
| 145287 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-75) | Nessus | SuSE Local Security Checks | high |
| 145120 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0133-1) | Nessus | SuSE Local Security Checks | high |
| 145025 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0117-1) | Nessus | SuSE Local Security Checks | high |
| 145018 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0118-1) | Nessus | SuSE Local Security Checks | high |
| 145005 | Amazon Linux AMI : kernel (ALAS-2021-1461) | Nessus | Amazon Linux Local Security Checks | high |
| 144959 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0108-1) | Nessus | SuSE Local Security Checks | high |
| 144914 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0098-1) | Nessus | SuSE Local Security Checks | high |
| 144908 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0095-1) | Nessus | SuSE Local Security Checks | high |
| 144750 | Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4679-1) | Nessus | Ubuntu Local Security Checks | high |
| 144749 | Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4680-1) | Nessus | Ubuntu Local Security Checks | high |
| 144731 | EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2021-1039) | Nessus | Huawei Local Security Checks | high |
| 144693 | EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-1028) | Nessus | Huawei Local Security Checks | high |
| 144687 | EulerOS : kernel (EulerOS-SA-2021-1009) | Nessus | Huawei Local Security Checks | high |
| 144464 | Amazon Linux AMI : kernel (ALAS-2020-1462) (deprecated) | Nessus | Amazon Linux Local Security Checks | high |
| 144313 | openSUSE Security Update : the Linux Kernel (openSUSE-2020-2260) | Nessus | SuSE Local Security Checks | high |
| 144259 | SUSE SLES15 Security Update : kernel (SUSE-SU-2020:3798-1) | Nessus | SuSE Local Security Checks | high |
| 144168 | EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-2514) | Nessus | Huawei Local Security Checks | high |
| 144143 | SUSE SLES15 Security Update : kernel (SUSE-SU-2020:3764-1) | Nessus | SuSE Local Security Checks | high |
| 144101 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3748-1) | Nessus | SuSE Local Security Checks | high |
| 143860 | SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3717-1) | Nessus | SuSE Local Security Checks | high |
| 143633 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3718-1) | Nessus | SuSE Local Security Checks | high |
| 143619 | SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3715-1) | Nessus | SuSE Local Security Checks | high |
| 143589 | Amazon Linux 2 : kernel (ALAS-2020-1566) | Nessus | Amazon Linux Local Security Checks | high |
| 143542 | openSUSE Security Update : the Linux Kernel (openSUSE-2020-2193) | Nessus | SuSE Local Security Checks | high |
| 143523 | openSUSE Security Update : the Linux Kernel (openSUSE-2020-2161) | Nessus | SuSE Local Security Checks | high |