CVE-2020-24352

Description

An issue was discovered in QEMU through 5.1.0. An out-of-bounds memory access was found in the ATI VGA device implementation. This flaw occurs in the ati_2d_blt() routine in hw/display/ati_2d.c while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

CVSS Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
• v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.14%• Percentile: 33%

Techniques & Countermeasures

• CWE-125•Out-of-bounds Read

  The product reads data past the end, or before the beginning, of the intended buffer.

• CWE-787•Out-of-bounds Write

  The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

• qemu•qemu

  ≤ 4.2.1 | 5.0.0:rc0 | 5.0.0:rc1

References (3)

• https://git.qemu.org/?p=qemu.git
• https://bugzilla.redhat.com/show_bug.cgi?id=1847584
• https://security.netapp.com/advisory/ntap-20201123-0003/