Vulnerability identifier: #VU63686
Vulnerability risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-399
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
1st Gen AMD EPYC Processors
Hardware solutions /
Firmware
3rd Gen AMD EPYC Processors
Hardware solutions /
Firmware
Vendor:
Description
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to the CPU may fail to flush the Translation Lookaside Buffer (TLB) in SEV guest VMs. A local user can execute a particular sequence of operations that includes creation of a new virtual machine control block (VMCB) and disclose the SEV guest memory contents.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
External links
http://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.