QEMU up to 2.5.0 NE2000 NIC Emulation hw/net/ne2000.c ne2000_receive input validation

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.
6.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in QEMU up to 2.5.0. This affects the function ne2000_receive of the file hw/net/ne2000.c of the component NE2000 NIC Emulation. Performing a manipulation results in input validation. This vulnerability is known as CVE-2016-2841. Attacking locally is a requirement. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in QEMU up to 2.5.0 (Virtualization Software). This affects the function ne2000_receive of the file hw/net/ne2000.c of the component NE2000 NIC Emulation. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The ne2000_receive function in the NE2000 NIC emulation support (hw/net/ne2000.c) in QEMU before 2.5.1 allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via crafted values for the PSTART and PSTOP registers, involving ring buffer control.

The weakness was published 06/16/2016 with Huawei (Website). It is possible to read the advisory at lists.gnu.org. This vulnerability is uniquely identified as CVE-2016-2841 since 03/02/2016. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed 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 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 84028†). Similar entries are available at VDB-81088, VDB-81198, VDB-81711 and VDB-82912. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

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

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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: 866835
OpenVAS Name: Fedora Update for qemu FEDORA-2016-372
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 415ab35a441eca767d033a2702223e785b9d5190

Timelineinfo

03/02/2016 🔍
03/02/2016 +0 days 🔍
03/19/2016 +17 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
Organization: Huawei
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2841 (🔍)
GCVE (CVE): GCVE-0-2016-2841
GCVE (VulDB): GCVE-100-87975
SecurityFocus: 84028 - QEMU 'ne2000.c' CVE-2016-2841 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 06/17/2016 16:42
Updated: 08/24/2022 08:35
Changes: 06/17/2016 16:42 (65), 01/26/2019 11:34 (14), 08/24/2022 08:33 (6), 08/24/2022 08:35 (1)
Complete: 🔍
Cache ID: 216:031:103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!