SB2020111624 - Advanced Virtualization for RHEL 8 update for the virt:8.2 and virt-devel:8.2 modules

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Main Vulnerability Database SB2020111624

SB2020111624 - Advanced Virtualization for RHEL 8 update for the virt:8.2 and virt-devel:8.2 modules

Published: November 16, 2020 Updated: April 24, 2025

Security Bulletin ID SB2020111624
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Reachable Assertion (CVE-ID: CVE-2020-16092)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when processing certain network packets on "e1000e" and "vmxnet3" devices in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c. A remote attacker on a guest operating system can send a specially crafted packet that will result in hypervisor crash.


2) Double Free (CVE-ID: CVE-2020-25637)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the libvirt API, responsible for requesting information about network interfaces of a running QEMU domain. A local client connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system.


Remediation

Install update from vendor's website.

References