QEMU USB OHCI Emulation hw/usb/hcd-ohci.c ohci_bus_start null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in QEMU. The affected element is the function ohci_bus_start of the file hw/usb/hcd-ohci.c of the component USB OHCI Emulation. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2016-2391. The attack requires local access. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (the affected version is unknown). It has been declared as critical. Affected by this vulnerability is the function ohci_bus_start of the file hw/usb/hcd-ohci.c of the component USB OHCI Emulation. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The ohci_bus_start function in the USB OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via vectors related to multiple eof_timers.

The weakness was presented 06/16/2016 by Alibaba (Website). The advisory is shared at lists.gnu.org. This vulnerability is known as CVE-2016-2391 since 02/16/2016. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 90045 (Fedora 23 : xen-4.5.2-9.fc23 (2016-f4504e9445)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176848 (Debian Security Update for qemu (DLA 1599-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (90045) and SecurityFocus (BID 83263†). See VDB-81088, VDB-81198, VDB-81711 and VDB-82912 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 90045
Nessus Name: Fedora 23 : xen-4.5.2-9.fc23 (2016-f4504e9445)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 55710
OpenVAS Name: SuSE Update for xen SUSE-SU-2016:1318-1 (xen)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: fa1298c2d623522eda7b4f1f721fcb935abb7360

Timelineinfo

02/16/2016 🔍
02/16/2016 +0 days 🔍
03/19/2016 +32 days 🔍
03/21/2016 +2 days 🔍
06/16/2016 +87 days 🔍
06/16/2016 +0 days 🔍
06/17/2016 +1 days 🔍
08/24/2022 +2259 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: FEDORA-2016-f4504e9445
Researcher: Alibaba
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2391 (🔍)
GCVE (CVE): GCVE-0-2016-2391
GCVE (VulDB): GCVE-100-87973
SecurityFocus: 83263 - QEMU 'hw/usb/hcd-ohci.c' Null Pointer Dereference Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 06/17/2016 16:41
Updated: 08/24/2022 08:23
Changes: 06/17/2016 16:41 (62), 01/26/2019 11:33 (16), 08/24/2022 08:20 (5), 08/24/2022 08:23 (1)
Complete: 🔍
Cache ID: 216:6A7:103

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