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Ryzen Threadripper Pro 5995Wx Firmware CVE-2023-20558

HIGH
Always-Incorrect Control Flow Implementation (CWE-670)
2023-04-02 psirt@amd.com
Privilege Escalation Amd Ryzen Threadripper Pro 5995Wx Firmware Ryzen Threadripper Pro 5965Wx Firmware Ryzen Threadripper Pro 5955Wx Firmware Ryzen Threadripper Pro 5945Wx Firmware Ryzen Threadripper 2990Wx Firmware Ryzen Threadripper 2970Wx Firmware Ryzen Threadripper 2950X Firmware Ryzen Threadripper 2920X Firmware Ryzen Threadripper 3960X Firmware Ryzen Threadripper 3970X Firmware Ryzen Threadripper 3990X Firmware Ryzen 7 2700X Firmware Ryzen 7 2700 Firmware Ryzen 5 2600X Firmware Ryzen 5 2600 Firmware Ryzen 3 3300X Firmware Ryzen 5 3500 Firmware Ryzen 5 3500X Firmware Ryzen 5 3600 Firmware Ryzen 5 3600X Firmware Ryzen 5 3600Xt Firmware Ryzen 7 3700X Firmware Ryzen 7 3800X Firmware Ryzen 7 3800Xt Firmware Ryzen 9 3900 Firmware Ryzen 9 3900X Firmware Ryzen 9 3900Xt Firmware Ryzen 9 3950X Firmware Ryzen 9 Pro 3900 Firmware Ryzen 7 4700G Firmware Ryzen 5 4600G Firmware Ryzen 3 4300G Firmware Ryzen 7 4700Ge Firmware Ryzen 5 4600Ge Firmware Ryzen 3 4300Ge Firmware Ryzen 7 2800H Firmware Ryzen 7 2700U Firmware Ryzen 5 2600H Firmware Ryzen 5 2500U Firmware Ryzen 3 2300U Firmware Ryzen 3 2200U Firmware Athlon Silver 3050U Firmware Athlon Gold 3150U Firmware Ryzen 3 3300U Firmware Ryzen 3 3250U Firmware Ryzen 3 3200U Firmware Ryzen 9 5980Hx Firmware Ryzen 9 5980Hs Firmware Ryzen 9 5900Hx Firmware Ryzen 9 5900Hs Firmware Ryzen 7 5800H Firmware Ryzen 7 5800Hs Firmware Ryzen 7 5825U Firmware Ryzen 7 5800U Firmware Ryzen 5 5600H Firmware Ryzen 5 5600Hs Firmware Ryzen 5 5625U Firmware Ryzen 5 5600U Firmware Ryzen 3 5425U Firmware Ryzen 3 5400U Firmware Ryzen 3 5125C Firmware Ryzen 3 5425C Firmware Ryzen 7 5825C Firmware Ryzen 5 5560U Firmware Ryzen Threadripper Pro 3945Wx Firmware Ryzen Threadripper Pro 3955Wx Firmware Ryzen Threadripper Pro 3975Wx Firmware Ryzen Threadripper Pro 3995Wx Firmware Ryzen Threadripper Pro 5975Wx Firmware Ryzen 5 5625C Firmware Ryzen 5 2700X Firmware Ryzen 5 2700 Firmware Ryzen 7 5700G Firmware Ryzen 7 5700Ge Firmware Ryzen 5 5600G Firmware Ryzen 5 5600Ge Firmware Ryzen 3 5300G Firmware Ryzen 3 5300Ge Firmware Ryzen Threadripper Pro 3795Wx Firmware Ryzen 3 3350U Firmware Ryzen 3 3450U Firmware Ryzen 3 3500U Firmware Ryzen 3 3500C Firmware Ryzen 3 3550H Firmware Ryzen 3 3580U Firmware Ryzen 3 3700U Firmware Ryzen 3 3700C Firmware Ryzen 3 3750H Firmware Ryzen 3 3780U Firmware
8.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Always-incorrect control flow
Impact

CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.7% exploitation probability (EPSS)

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AnalysisAI

Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-670. Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges. Affected products include: Amd Ryzen 7 5700G Firmware, Amd Ryzen 7 5700Ge Firmware, Amd Ryzen 5 5600G Firmware, Amd Ryzen 5 5600Ge Firmware, Amd Ryzen 3 5300G Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges.

Threat Intelligence Overview

EPSS Score
0.7%
Top 52% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.7%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

45
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

Affected Products (CPE)NVD

cpe:2.3:o:amd:ryzen_7_5700g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5980hx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5980hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5825u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900hx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5825c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5625u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5625c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600u_firmware:*:*:*:*:*:*:*:*
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