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.
5.1	$0-$5k	0.00

A vulnerability was found in QEMU (Virtualization Software) (affected version unknown). It has been rated as problematic. Affected by this issue is the function v9fs_list_xattr of the file hw/9pfs/9p-xattr.c. The manipulation of the argument orig_value with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

Memory leak in the v9fs_list_xattr function in hw/9pfs/9p-xattr.c in QEMU (aka Quick Emulator) allow local guest OS privileged users to cause a denial of service (memory consumption) via vectors involving the orig_value variable.

The bug was discovered 04/25/2017. The weakness was presented 05/02/2017 by Li Qiang with 360.cn Inc. (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2017-8086 since 04/24/2017. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100250 (Ubuntu 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : qemu vulnerabilities (USN-3289-1)), 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 170142 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2017:1774-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu.org. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (100250). See 98316, 99556, 100418 and 100809 for similar entries.

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: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.8
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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
CAPEC: 🔍
ATT&CK: 🔍

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: 100250
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : qemu vulnerabilities (USN-3289-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850584
OpenVAS Name: SuSE Update for qemu openSUSE-SU-2017:1872-1 (qemu)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: 4ffcdef4277a91af15a3c09f7d16af072c29f3f2

Timelineinfo

04/24/2017 🔍
04/24/2017 +0 days 🔍
04/25/2017 +1 days 🔍
05/02/2017 +7 days 🔍
05/02/2017 +0 days 🔍
05/02/2017 +0 days 🔍
05/16/2017 +14 days 🔍
05/17/2017 +1 days 🔍
12/02/2022 +2025 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3289-1
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-8086 (🔍)
SecurityFocus: 98012 - QEMU CVE-2017-8086 Denial of Service Vulnerability
OSVDB: - CVE-2017-8086 - QEMU - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 05/02/2017 22:36
Updated: 12/02/2022 18:24
Changes: 05/02/2017 22:36 (82), 09/23/2020 08:21 (3), 12/02/2022 18:16 (5), 12/02/2022 18:24 (1)
Complete: 🔍

Discussion

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