CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.8	$0-$5k	0.00

A vulnerability was found in QEMU (Virtualization Software) (affected version not known). It has been declared as problematic. This vulnerability affects the function ehci_process_itd of the file hw/usb/hcd-ehci.c. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

Memory leak in the ehci_process_itd function in hw/usb/hcd-ehci.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption) via a large number of crafted buffer page select (PG) indexes.

The bug was discovered 12/09/2016. The weakness was disclosed 12/10/2016 by Li Qiang with 360.cn Inc. (Website). The advisory is shared for download at git.qemu.org. This vulnerability was named CVE-2016-7995 since 09/09/2016. The attack needs to be approached locally. A single authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 94669 (Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : qemu, qemu-kvm vulnerabilities (USN-3125-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276208 (Fedora Security Update for qemu (FEDORA-2016-a56fb613a8)).

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 (94669). The entries 92454, 92520, 93307 and 93311 are pretty similar.

Productinfo

Type

• Virtualization Software

Name

• QEMU

License

• open-source

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.0
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 94669
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : qemu, qemu-kvm vulnerabilities (USN-3125-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65001
OpenVAS Name: Fedora Update for qemu FEDORA-2016-3d3218ec41
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: b16c129daf0fed91febbb88de23dae8271c8898a

Timelineinfo

09/09/2016 🔍
10/07/2016 +28 days 🔍
11/09/2016 +33 days 🔍
11/10/2016 +1 days 🔍
12/09/2016 +29 days 🔍
12/09/2016 +0 days 🔍
12/10/2016 +1 days 🔍
12/10/2016 +0 days 🔍
10/05/2022 +2125 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3125-1
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-7995 (🔍)
SecurityFocus: 93454 - Qemu 'hcd-ehci.c' Memory Leak Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/10/2016 13:38
Updated: 10/05/2022 11:57
Changes: 12/10/2016 13:38 (62), 06/22/2019 20:07 (17), 10/05/2022 11:49 (4), 10/05/2022 11:57 (1)
Complete: 🔍

Discussion

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