Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2016-4037

Uncontrolled Resource Consumption

Published: May 23, 2016 | Modified: Apr 12, 2025
CVSS 3.x
6
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
CVSS 2.x
4.9 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
2.3 LOW
AV:A/AC:M/Au:S/C:N/I:N/A:P
RedHat/V3
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-4037
CWEhttps://cwe.mitre.org/data/definitions/400.html

The ehci_advance_state function in hw/usb/hcd-ehci.c in QEMU allows local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list, a related issue to CVE-2015-8558.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

NameVendorStart VersionEnd Version
FedoraFedoraproject22 (including)22 (including)
FedoraFedoraproject23 (including)23 (including)
FedoraFedoraproject24 (including)24 (including)
QemuUbuntuesm-infra-legacy/trusty*
QemuUbuntuesm-infra/xenial*
QemuUbuntutrusty*
QemuUbuntutrusty/esm*
QemuUbuntuwily*
QemuUbuntuxenial*
Qemu-kvmUbuntuprecise*

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References

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