Access of Uninitialized Pointer Affecting virt:rhel/libguestfs-tools-c package, versions <1:1.40.2-28.module_el8.5.0+2608+72063365.alma


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-ALMALINUX8-VIRT-5654933
  • published28 May 2023
  • disclosed9 Nov 2021

Introduced: 9 Nov 2021

CVE-2021-3593  (opens in a new tab)
CWE-824  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 virt:rhel/libguestfs-tools-c to version 1:1.40.2-28.module_el8.5.0+2608+72063365.alma or higher.
This issue was patched in ALSA-2021:4191.

NVD Description

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

An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.

CVSS Scores

version 3.1