CVE-2024-4418: Libvirt: stack use-after-free in virnetclientioeventloop()
First published: Thu May 02 2024(Updated: )
A race condition leading to a stack use-after-free bug 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 virNetClientIOEventFD callback while the data pointer's stack frame was concurrently being "freed" when returning from virNetClientIOEventLoop(). Quoting libvirt maintainer Daniel P. Berrangé: The 'virtproxyd' daemon can be used to trigger requests which could potentially exercise the bug. If libvirt is configured with fine grained access control, this could in theory let a user escape their otherwise limited access. A local unprivileged user can access virtproxyd without authenticating. Remote users would need to authenticate before they could exercise it.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/libvirt | <10.0.0-2ubuntu8.2 | 10.0.0-2ubuntu8.2 |
| debian/libvirt | 5.0.0-4+deb10u1 5.0.0-4+deb10u2 7.0.0-3+deb11u2 9.0.0-4 10.3.0-3 10.4.0-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2024-4418
- https://ubuntu.com/security/notices/USN-6763-1
- https://nvd.nist.gov/vuln/detail/CVE-2024-4418
- https://launchpad.net/bugs/cve/CVE-2024-4418
- https://security-tracker.debian.org/tracker/CVE-2024-4418
- https://gitlab.com/libvirt/libvirt/-/commit/8074d64dc2eca846d6a61efe1a9b7428a0ce1dd1
- https://ubuntu.com/security/CVE-2024-4418
- https://bugzilla.redhat.com/show_bug.cgi?id=2278616
- https://access.redhat.com/security/cve/CVE-2024-4418
- https://gitlab.com/libvirt/libvirt/-/commit/7cb03e6a28e465c49f0cabe8fe2e7d21edb5aadf
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4IE44UIIC3QWBFRB4EUSFNLJBU6JLNSD/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2278618
- https://access.redhat.com/errata/RHSA-2024:4351
- https://access.redhat.com/errata/RHSA-2024:4432
- https://access.redhat.com/errata/RHSA-2024:4757
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