SB2021020319 - Red Hat Enterprise Linux 7 update for qemu-kvm 

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Main Vulnerability Database SB2021020319

SB2021020319 - Red Hat Enterprise Linux 7 update for qemu-kvm

Published: February 3, 2021

Security Bulletin ID SB2021020319
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2020-13765)

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in rom_copy() in hw/core/loader.c. A local user on the guest operating system can create a specially data to the application, trigger out-of-bounds write and execute arbitrary code on the host system.


2) 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.


Remediation

Install update from vendor's website.

References