CVE-2024-4418

Publication date 5 May 2024

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
libvirt 24.10 oracular
Fixed 10.0.0-2ubuntu8.2
24.04 LTS noble
Fixed 10.0.0-2ubuntu8.2
23.10 mantic
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

mdeslaur

This issue is probably introduced by: https://gitlab.com/libvirt/libvirt/-/commit/7cb03e6a28e465c49f0cabe8fe2e7d21edb5aadf so only noble and higher are affected.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libvirt

References

Related Ubuntu Security Notices (USN)

Other references