CVE-2020-25723

Description

A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service.

CVSS Metrics

• v3.1•LOW•Score: 3.2CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
• v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.04%• Percentile: 11%

Techniques & Countermeasures

• CWE-617•Reachable Assertion

  The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Affected Systems

• debian•debian_linux

  10.0

• qemu•qemu

  ≤ 5.1.1

References (4)

• https://bugzilla.redhat.com/show_bug.cgi?id=1898579
• https://security.netapp.com/advisory/ntap-20201218-0004/
• http://www.openwall.com/lists/oss-security/2020/12/22/1
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html