Vulnerability CVE-2020-12967 - CERT Civis.Net

Vulnerability Name:

CVE-2020-12967 (CCN-202052)

Assigned:

2020-05-15

Published:

2021-05-11

Updated:

2021-05-25

Summary:

The lack of nested page table protection in the AMD SEV/SEV-ES feature could potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.

CVSS v3 Severity:

7.2 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): High User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

7.2 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.3 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): High User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

9.0 High (CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

9.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2020-12967

Source: XF
Type: UNKNOWN
amd-cve202012967-code-exec(202052)

Source: CCN
Type: AMD web site
AMD Secure Encrypted Virtualization

Source: MISC
Type: Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1004

Vulnerable Configuration:

Configuration 1:

cpe:/h:amd:epyc_7232p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7251:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7252:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7261:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7262:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7272:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7281:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7282:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_72f3:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7301:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7302:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7302p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7351:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7351p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7371:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7401:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7401p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7451:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7501:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7513:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7453:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_74f3:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7443p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7443:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7413:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_73f3:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7343:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7313p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7313:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7532:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7502:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7502p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7452:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7402:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7402p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7352:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7551:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7551p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7601:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7763:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7713p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7713:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7663:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7643:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_75f3:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7543p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7543:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7f72:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7f52:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7f32:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7h12:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7742:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7702:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7702p:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7662:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7642:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7552:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_7542:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3351:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3255:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3251:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3201:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3151:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3101:-:*:*:*:*:*:*:*

OR cpe:/h:amd:epyc_embedded_3451:-:*:*:*:*:*:*:*

Denotes that component is vulnerable