CVE Vulnerabilities

CVE-2017-13673

Reachable Assertion

Published: Aug 29, 2017 | Modified: Oct 03, 2019
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
4 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P
RedHat/V2
2.3 LOW
AV:A/AC:M/Au:S/C:N/I:N/A:P
RedHat/V3
3 LOW
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L
Ubuntu

The vga display update in mis-calculated the region for the dirty bitmap snapshot in case split screen mode is used causing a denial of service (assertion failure) in the cpu_physical_memory_snapshot_get_dirty function.

Weakness

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 Software

Name Vendor Start Version End Version
Qemu Qemu 2.8.0 2.8.0
Qemu Qemu 2.9.0 2.9.0
Red Hat OpenStack Platform 10.0 (Newton) RedHat qemu-kvm-rhev-10:2.10.0-21.el7 *
Red Hat OpenStack Platform 11.0 (Ocata) RedHat qemu-kvm-rhev-10:2.10.0-21.el7 *
Red Hat OpenStack Platform 12.0 (Pike) RedHat qemu-kvm-rhev-10:2.10.0-21.el7 *
Red Hat OpenStack Platform 8.0 (Liberty) RedHat qemu-kvm-rhev-10:2.10.0-21.el7 *
Red Hat OpenStack Platform 9.0 (Mitaka) RedHat qemu-kvm-rhev-10:2.10.0-21.el7 *
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 RedHat qemu-kvm-rhev-10:2.10.0-21.el7 *

Extended Description

While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.

Potential Mitigations

References