CVE-2024-45819: xen Permission Flaw — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-276 Incorrect Default Permissions

Affected Products

Vendor	Product	Versions
xen	xen	>= 4.8.0

References

Advisories & Patches

https://xenbits.xenproject.org/xsa/advisory-464.html http://xenbits.xen.org/xsa/advisory-464.html

Other References

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

Frequently Asked Questions

What is CVE-2024-45819? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-45819? +

CVE-2024-45819 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-45819? +

CVE-2024-45819 affects products from xen, specifically: xen. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-45819? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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