CVE-2023-20587
No known exploitation. EPSS puts it in the 6th percentile. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
What it is
From the CVE record
Improper Access Control in System Management Mode (SMM) may allow an attacker access to the SPI flash potentially leading to arbitrary code execution.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 6th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
3 events over 449 days, from the signal feeds we watch.
- Record updated
- Publishedweakness classified
Affected products
- 3rd Gen AMD EPYC™ ProcessorsHardware Firmware
- 4th Gen AMD EPYC™ ProcessorsHardware Firmware
- 1st Gen AMD EPYC™ ProcessorsHardware Firmware
- 2nd Gen AMD EPYC™ ProcessorsHardware Firmware
- AMD EPYC(TM) Embedded 3000 Hardware Firmware
- AMD EPYC(TM) Embedded 7002 Hardware Firmware
- AMD EPYC(TM) Embedded 7003Hardware Firmware
- AMD EPYC(TM) Embedded 9003Hardware Firmware
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Scored 7.1 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability NoneNo availability impact
Weaknesses
Sources
References in the record
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