CVE-2020-11869: qemu Integer Overflow or Wraparound

Vulnerability summary

CVE-2020-11869 is a low (CVSS 3.3) Integer Overflow or Wraparound vulnerability in qemu. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.7% of scored vulnerabilities.

Timeline

1. 27-04-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

An integer overflow was found in QEMU 4.0.1 through 4.2.0 in the way it implemented ATI VGA emulation. 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 abuse this flaw to crash the QEMU process, resulting in a denial of service.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.