SARA / Free Tools / CVE / CVE-2023-20533

CVE-2023-20533 — Insufficient DRAM address validation in System Management Unit (SMU) may allow a

Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.

CVSS

6.1 MEDIUM

EPSS

0.03% (top 90.90%)

CWE

—

Published

2023-11-14T18:52:52.106Z

Last modified

2024-08-02T09:05:36.915Z

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H

01What is this vulnerability?

Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.

02Affected products

Vendor	Product	Versions
AMD	Ryzen™ 3000 series Desktop Processors “Matisse"	various
AMD	AMD Ryzen™ 5000 Series Desktop Processors “Vermeer”	various
AMD	AMD Ryzen™ Threadripper™ 3000 Series Processors “Castle Peak” HEDT	various
AMD	AMD Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS SP3	various
AMD	AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors “Chagall” WS	various
AMD	2nd Gen AMD EPYC™ Processors	various
AMD	3rd Gen AMD EPYC™ Processors	various
AMD	AMD EPYC™ Embedded 7002	various
AMD	AMD EPYC™ Embedded 7003	various
AMD	AMD Ryzen™ Embedded 5000	various
AMD	AMD EPYC™ Embedded 7002	various
AMD	AMD EPYC™ Embedded 7003	various

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

Published: 2023-11-14T18:52:52.106Z
Last modified: 2024-08-02T09:05:36.915Z

09References

www.amd.com — https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002
www.amd.com — https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002
www.amd.com — https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001

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