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Vulnerability of QEMU: memory corruption via sdhci

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger a memory corruption via sdhci of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
Impacted systems: Debian, QEMU, SLES.
Severity of this alert: 2/4.
Creation date: 09/03/2021.
Références of this alert: CVE-2021-3409, DLA-2623-1, SUSE-SU-2021:1942-1, VIGILANCE-VUL-34781.

Description of the vulnerability 

An attacker, inside a guest system, can trigger a memory corruption via sdhci of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
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This security weakness impacts software or systems such as Debian, QEMU, SLES.

Our Vigil@nce team determined that the severity of this threat bulletin is medium.

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 threat.

Solutions for this threat 

QEMU: patch for sdhci.
A patch is indicated in information sources.

Debian 9: new qemu packages (12/04/2021).
New packages are available:
  Debian 9: qemu 1:2.8+dfsg-6+deb9u14

SUSE LE 15 SP3: new qemu packages.
New packages are available:
  SUSE LE 15 SP3: qemu 5.2.0-17.1
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