CVE-2024-45819

libxl leaks data to PVH guests via ACPI tables

Description

PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the tables in local memory, which are then copied into guest memory. While actually used parts of the local memory are filled in correctly, excess space that is being allocated is left with its prior contents.

Remediation

Workaround:

  • Running only PV or HVM guests will avoid this vulnerability.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Xen Xen
Published at:
Updated at:

References

Link Tags
https://xenbits.xenproject.org/xsa/advisory-464.html
http://www.openwall.com/lists/oss-security/2024/11/12/1
http://www.openwall.com/lists/oss-security/2024/11/12/10
http://www.openwall.com/lists/oss-security/2024/11/12/7
http://xenbits.xen.org/xsa/advisory-464.html

Frequently Asked Questions

What is the severity of CVE-2024-45819?
CVE-2024-45819 has been scored as a medium severity vulnerability.
How to fix CVE-2024-45819?
As a workaround for remediating CVE-2024-45819: Running only PV or HVM guests will avoid this vulnerability.
Is CVE-2024-45819 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-45819 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-45819?
CVE-2024-45819 affects Xen Xen.
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