VDB-114936 · CVE-2018-8933 · Qualys 370876

AMD EPYC Server Protected Memory FALLOUT 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 labeled as critical has been found in AMD EPYC Server. This affects an unknown function of the component Protected Memory. The manipulation results in access control (FALLOUT). This vulnerability is identified as CVE-2018-8933. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in AMD EPYC Server (the affected version unknown). It has been classified as critical. Affected is an unknown part of the component Protected Memory. The manipulation with an unknown input leads to a access control vulnerability (FALLOUT). CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The AMD EPYC Server processor chips have insufficient access control for protected memory regions, aka FALLOUT-1, FALLOUT-2, and FALLOUT-3.

The bug was discovered 03/13/2018. The weakness was released 03/22/2018 (Website). The advisory is shared for download at amdflaws.com. This vulnerability is traded as CVE-2018-8933 since 03/22/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

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.

Entries connected to this vulnerability are available at VDB-114933, VDB-114934, VDB-114935 and VDB-114937. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: FALLOUT
Class: Access control / FALLOUT
CWE: CWE-284 / CWE-266
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
Confirmation: 🔍

CVE: CVE-2018-8933 (🔍)
GCVE (CVE): GCVE-0-2018-8933
GCVE (VulDB): GCVE-100-114936
See also: 🔍

Entryinfo

Created: 03/23/2018 10:09
Updated: 01/16/2020 08:14
Changes: 03/23/2018 10:09 (59), 01/16/2020 08:14 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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