VDB-114938 · CVE-2018-8935 · Qualys 370876

AMD Ryzen/Ryzen Pro Promontory Chipset CHIMERA-HW access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in AMD Ryzen and Ryzen Pro. Affected is an unknown function of the component Promontory Chipset. Such manipulation leads to access control (CHIMERA-HW). This vulnerability is listed as CVE-2018-8935. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in AMD Ryzen and Ryzen Pro (unknown version). It has been rated as critical. Affected by this issue is an unknown code block of the component Promontory Chipset. The manipulation with an unknown input leads to a access control vulnerability (CHIMERA-HW). Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in the ASIC, aka CHIMERA-HW.

The bug was discovered 03/13/2018. The weakness was presented 03/22/2018 (Website). The advisory is available at amdflaws.com. This vulnerability is handled as CVE-2018-8935 since 03/22/2018. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

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.

See VDB-114933, VDB-114934, VDB-114935 and VDB-114936 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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

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

NVD Base Score: 🔍

Exploitinginfo

Name: CHIMERA-HW
Class: Access control / CHIMERA-HW
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-2018-8935 (🔍)
GCVE (CVE): GCVE-0-2018-8935
GCVE (VulDB): GCVE-100-114938
See also: 🔍

Entryinfo

Created: 03/23/2018 10:35
Updated: 01/16/2020 08:21
Changes: 03/23/2018 10:35 (59), 01/16/2020 08:21 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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