Use After Free Affecting qemu package, versions <1:2.11+dfsg-1ubuntu7.41


Severity

Recommended
low

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.08% (34th percentile)

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  • Snyk ID SNYK-UBUNTU1804-QEMU-2442430
  • published 7 Apr 2022
  • disclosed 26 Aug 2022

How to fix?

Upgrade Ubuntu:18.04 qemu to version 1:2.11+dfsg-1ubuntu7.41 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A use-after-free vulnerability was found in the LSI53C895A SCSI Host Bus Adapter emulation of QEMU. The flaw occurs while processing repeated messages to cancel the current SCSI request via the lsi_do_msgout function. This flaw allows a malicious privileged user within the guest to crash the QEMU process on the host, resulting in a denial of service.

CVSS Scores

version 3.1
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NVD

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

5.3 medium
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Red Hat

5.3 medium