High severity · published Mar 23, 2023
CVE-2023-20559
Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
2G
2nd Gen AMD Ryzen™ Threadripper™ Processor · AMD
Various · source: vendor
3G
3rd Gen AMD Ryzen™ Threadripper™ Processors · AMD
various · source: vendor
R2
Ryzen™ 2000 Series · AMD
various · source: vendor
R3
Ryzen™ 3000 Series · AMD
various · source: vendor
R4
Ryzen™ 4000 Series · AMD
various · source: vendor
R5
Ryzen™ 5000 Series · AMD
various · source: vendor
RT
Ryzen™ Threadripper™ PRO Processor · AMD
various · source: vendor
AG
Athlon Gold 3150u Firmware · Amd
All versions, or not specified · source: NVD
AS
Athlon Silver 3050u Firmware · Amd
All versions, or not specified · source: NVD
R3
Ryzen 3 2200u Firmware · Amd
before comboam4v2_pi_1.2.0.6c · source: NVD
R3
Ryzen 3 2300u Firmware · Amd
before comboam4v2_pi_1.2.0.6c · source: NVD
R3
Ryzen 3 3200u Firmware · Amd
All versions, or not specified · source: NVD
Affected product
2G
2nd Gen AMD Ryzen™ Threadripper™ Processor
AMD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-20559
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-20559
Vendor Advisory
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-1027.html
More from 2nd Gen AMD Ryzen™ Threadripper™ Processor
8.8
CVE-2023-20558
Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges