The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of QEMU: NULL pointer dereference via ide_cancel_dma_sync

Synthesis of the vulnerability 

An attacker, inside a guest system, can force a NULL pointer to be dereferenced via ide_cancel_dma_sync() of QEMU, in order to trigger a denial of service on the host system.
Impacted systems: QEMU.
Severity of this alert: 1/4.
Creation date: 29/09/2020.
Références of this alert: CVE-2020-25743, VIGILANCE-VUL-33449.

Description of the vulnerability 

An attacker, inside a guest system, can force a NULL pointer to be dereferenced via ide_cancel_dma_sync() of QEMU, in order to trigger a denial of service on the host system.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This threat note impacts software or systems such as QEMU.

Our Vigil@nce team determined that the severity of this cybersecurity note is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this vulnerability note.

Solutions for this threat 

QEMU: patch for ide_cancel_dma_sync.
A patch is indicated in information sources.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides systems vulnerabilities alerts. The Vigil@nce vulnerability database contains several thousand vulnerabilities.