CVE-2024-4418
MEDIUMDescription
A race condition leading to a stack use-after-free flaw was found in libvirt. Due to a bad assumption in the virNetClientIOEventLoop() method, the `data` pointer to a stack-allocated virNetClientIOEventData structure ended up being used in the virNetClientIOEventFD callback while the data pointer's stack frame was concurrently being "freed" when returning from virNetClientIOEventLoop(). The 'virtproxyd' daemon can be used to trigger requests. If libvirt is configured with fine-grained access control, this issue, in theory, allows a user to escape their otherwise limited access. This flaw allows a local, unprivileged user to access virtproxyd without authenticating. Remote users would need to authenticate before they could access it.
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-562
CWE-562
References
Other References
https://access.redhat.com/errata/RHSA-2024:4351
https://access.redhat.com/errata/RHSA-2024:4432
https://access.redhat.com/errata/RHSA-2024:4757
https://access.redhat.com/security/cve/CVE-2024-4418
https://bugzilla.redhat.com/show_bug.cgi?id=2278616
https://access.redhat.com/errata/RHSA-2024:4351
https://access.redhat.com/errata/RHSA-2024:4432
https://access.redhat.com/errata/RHSA-2024:4757
https://access.redhat.com/security/cve/CVE-2024-4418
https://bugzilla.redhat.com/show_bug.cgi?id=2278616
Frequently Asked Questions
What is CVE-2024-4418? +
A race condition leading to a stack use-after-free flaw was found in libvirt. Due to a bad assumption in the virNetClientIOEventLoop() method, the `data` pointer to a stack-allocated virNetClientIOEventData structure ended up being used in the virNetClientIOEventFD callback while the data pointer's stack frame was concurrently being "freed" when returning from virNetClientIOEventLoop(). The 'virtproxyd' daemon can be used to trigger requests. If libvirt is configured with fine-grained access control, this issue, in theory, allows a user to escape their otherwise limited access. This flaw allows a local, unprivileged user to access virtproxyd without authenticating. Remote users would need to authenticate before they could access it. It has a CVSS v3.1 base score of 6.2 (MEDIUM).
How severe is CVE-2024-4418? +
CVE-2024-4418 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-2024-4418? +
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.