Use After Free Affecting qemu-img package, versions <15:6.2.0-11.module+el8.6.0+14707+5aa4b42d


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.15% (52nd percentile)

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  • Snyk ID SNYK-CENTOS8-QEMUIMG-2819796
  • published 19 Nov 2021
  • disclosed 17 Nov 2021

How to fix?

Upgrade Centos:8 qemu-img to version 15:6.2.0-11.module+el8.6.0+14707+5aa4b42d or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-img package and not the qemu-img package as distributed by Centos. See How to fix? for Centos: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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Red Hat

5.3 medium
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SUSE

4.4 medium