NULL Pointer Dereference Affecting virt:rhel/lua-guestfs package, versions <1:1.44.0-9.module+el8.8.0+16781+9f4724c2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.09% (40th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-5909218
  • published28 Jun 2023
  • disclosed28 Jun 2023

Introduced: 28 Jun 2023

CVE-2023-3354  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/lua-guestfs to version 1:1.44.0-9.module+el8.8.0+16781+9f4724c2 or higher.
This issue was patched in RHSA-2023:5264.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/lua-guestfs package and not the virt:rhel/lua-guestfs package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.

CVSS Scores

version 3.1