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.
4.3	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in QEMU (Virtualization Software) (the affected version unknown). This affects the function net_tx_pkt_do_sw_fragmentation of the file hw/net/net_tx_pkt.c of the component Fragment Length Handler. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

The net_tx_pkt_do_sw_fragmentation function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a zero length for the current fragment length.

The bug was discovered 12/09/2016. The weakness was shared 12/10/2016 by Li Qiang with 360.cn Inc. (Website). It is possible to read the advisory at git.qemu.org. This vulnerability is uniquely identified as CVE-2016-6834 since 08/17/2016. Attacking locally is a requirement. A authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

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 169239 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2016:2473-1)).

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 (94669). The entries 90368, 91386, 92520 and 93311 are related to this item.

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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
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: 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: 66197
OpenVAS Name: SuSE Update for xen openSUSE-SU-2016:2497-1 (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: ead315e43ea0c2ca3491209c6c8db8ce3f2bbe05

Timelineinfo

08/12/2016 🔍
08/17/2016 +5 days 🔍
11/09/2016 +84 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-2016-6834 (🔍)
SecurityFocus: 92446 - QEMU '/hw/net/net_tx_pkt.c' Packet Fragmentation Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/10/2016 13:38
Updated: 10/05/2022 09:44
Changes: 12/10/2016 13:38 (63), 06/22/2019 17:43 (17), 10/05/2022 09:43 (5), 10/05/2022 09:44 (1)
Complete: 🔍
Cache ID: 18:D87:103

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