CVE-2024-2494 (CVSS 6.2)

Description

A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.

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CVSS v3.1 Score

6.2

MEDIUM

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

Weakness Type (CWE)

CWE-789 CWE-789

References

Other References

https://access.redhat.com/errata/RHSA-2024:2560 https://access.redhat.com/errata/RHSA-2024:3253 https://access.redhat.com/security/cve/CVE-2024-2494 https://bugzilla.redhat.com/show_bug.cgi?id=2270115 https://lists.libvirt.org/archives/list/[email protected]/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/ https://access.redhat.com/errata/RHSA-2024:2560 https://access.redhat.com/errata/RHSA-2024:3253 https://access.redhat.com/security/cve/CVE-2024-2494 https://bugzilla.redhat.com/show_bug.cgi?id=2270115 https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

Frequently Asked Questions

What is CVE-2024-2494? +

A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash. It has a CVSS v3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2024-2494? +

CVE-2024-2494 has a CVSS v3.1 score of 6.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2024-2494? +

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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