Use After Free Affecting qemu-kvm-block-iscsi package, versions <15:4.2.1-18.module+el8.6.0+20690+93de6acb


Severity

Recommended
high

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    0.15% (52nd percentile)

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  • Snyk ID SNYK-ORACLE8-QEMUKVMBLOCKISCSI-2831003
  • published 18 May 2022
  • disclosed 23 Aug 2022

How to fix?

Upgrade Oracle:8 qemu-kvm-block-iscsi to version 15:4.2.1-18.module+el8.6.0+20690+93de6acb or higher.
This issue was patched in ELSA-2022-9700.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm-block-iscsi package and not the qemu-kvm-block-iscsi package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

CVSS Scores

version 3.1
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NVD

6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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SUSE

4.4 medium
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Red Hat

5.3 medium