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Use After Free Affecting libvirt-daemon-plugin-sanlock package, versions <0:10.0.0-6.6.el9_4.alma.1

Severity

 Recommended
medium

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.05% (17th percentile)

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  • Snyk ID SNYK-ALMALINUX9-LIBVIRTDAEMONPLUGINSANLOCK-7568914
  • published 25 Jul 2024
  • disclosed 23 Jul 2024
Report a new vulnerability Found a mistake?

Introduced: 23 Jul 2024

CVE-2024-4418 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:9 libvirt-daemon-plugin-sanlock to version 0:10.0.0-6.6.el9_4.alma.1 or higher.
This issue was patched in ALSA-2024:4757.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt-daemon-plugin-sanlock package and not the libvirt-daemon-plugin-sanlock package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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 Scores

version 3.1
Expand this section

SUSE

6.2 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
Expand this section

Red Hat

6.2 medium