VDB-114939 · CVE-2018-8936 · Qualys 370876

AMD EPYC Server/Ryzen/Ryzen Pro/Ryzen Mobile Platform Security Processor access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in AMD EPYC Server, Ryzen, Ryzen Pro and Ryzen Mobile. Affected by this vulnerability is an unknown functionality of the component Platform Security Processor. Performing a manipulation results in access control. This vulnerability is cataloged as CVE-2018-8936. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in AMD EPYC Server, Ryzen, Ryzen Pro and Ryzen Mobile (version now known). This affects some unknown processing of the component Platform Security Processor. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The AMD EPYC Server, Ryzen, Ryzen Pro, and Ryzen Mobile processor chips allow Platform Security Processor (PSP) privilege escalation.

The bug was discovered 03/13/2018. The weakness was shared 03/22/2018 (Website). It is possible to read the advisory at amdflaws.com. This vulnerability is uniquely identified as CVE-2018-8936 since 03/22/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370876 (AMD Processors Multiple Security Vulnerabilities (RYZENFALL/MASTERKEY/CHIMERA-FW/FALLOUT)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-114933, VDB-114934, VDB-114935 and VDB-114936 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.7

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.0
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/13/2018 🔍
03/22/2018 +9 days 🔍
03/22/2018 +0 days 🔍
03/22/2018 +0 days 🔍
03/23/2018 +1 days 🔍
01/16/2020 +664 days 🔍

Sourcesinfo

Advisory: amdflaws.com
Status: Not defined

CVE: CVE-2018-8936 (🔍)
GCVE (CVE): GCVE-0-2018-8936
GCVE (VulDB): GCVE-100-114939
See also: 🔍

Entryinfo

Created: 03/23/2018 10:35
Updated: 01/16/2020 08:22
Changes: 03/23/2018 10:35 (58), 01/16/2020 08:22 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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