CVE-2021-39298
What it is
A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SMM resulting in arbitrary code execution which could be used by malicious actors to bypass security mechanisms provided in the UEFI firmware.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.4% chance of exploitation in the next 30 days (EPSS).
- Fix
- No patch or advisory is linked yet. Look at mitigations or restrict exposure.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.4% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: none linked yet, which raises it.
Details
- Published
- Last modified
- Exploit probability
- 0.4% · EPSS, next 30 days
- Weakness
- CWE-269 · Improper privilege management
- Record status
- Modified
Affected
- HP z1 Entry Tower g5 Workstation Firmware < 02.12.00
- HP z1 Entry Tower g6 Workstation Firmware < 02.10.00
- HP z1 g8 Tower Desktop Pc Firmware < 02.07.00
- HP z4 g4 Workstation \(core-x\) Firmware < 02.75
- HP z4 g4 Workstation \(xeon w\) Firmware < 02.75
- HP z6 g4 Workstation Firmware < 02.75
- HP z8 g4 Workstation Firmware < 02.75
- HP Engage Flex Mini Retail System Firmware < 02.10.00
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-39298.md and follow it. Check whether this project is affected by CVE-2021-39298. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
