QEMU USB EHCI Emulation null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in QEMU. Affected by this vulnerability is an unknown functionality of the component USB EHCI Emulation. The manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2016-2198. The attack needs to be performed locally. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (the affected version is unknown) and classified as problematic. This issue affects an unknown code of the component USB EHCI Emulation. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

QEMU (aka Quick Emulator) built with the USB EHCI emulation support is vulnerable to a null pointer dereference flaw. It could occur when an application attempts to write to EHCI capabilities registers. A privileged user inside quest could use this flaw to crash the QEMU process instance resulting in DoS.

The bug was discovered 01/29/2016. The weakness was released 12/29/2016 (Website). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2016-2198 since 01/29/2016. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 50 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 90036 (Fedora 22 : xen-4.5.2-9.fc22 (2016-38b20aa50f)), 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 196391 (Ubuntu Security Notification for Qemu, Qemu-kvm Vulnerabilities (USN-2891-1)).

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 vulnerability database at Tenable (90036). Entries connected to this vulnerability are available at VDB-81198 and VDB-81711. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 90036
Nessus Name: Fedora 22 : xen-4.5.2-9.fc22 (2016-38b20aa50f)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 880768
OpenVAS Name: Ubuntu Update for qemu USN-2891-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/29/2016 🔍
01/29/2016 +0 days 🔍
03/19/2016 +50 days 🔍
03/21/2016 +2 days 🔍
12/29/2016 +283 days 🔍
12/29/2016 +0 days 🔍
12/30/2016 +1 days 🔍
10/13/2022 +2112 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: FEDORA-2016-38b20aa50f
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2198 (🔍)
GCVE (CVE): GCVE-0-2016-2198
GCVE (VulDB): GCVE-100-94721
See also: 🔍

Entryinfo

Created: 12/30/2016 10:29
Updated: 10/13/2022 00:17
Changes: 12/30/2016 10:29 (64), 07/22/2019 06:56 (9), 10/13/2022 00:03 (3), 10/13/2022 00:17 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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