VDB-94715 · CVE-2015-8744 · BID 79821

QEMU VMWARE VMXNET3 Paravirtual NIC Emulator Layer-2 Packet input validation

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

A vulnerability was found in QEMU (Virtualization Software) (unknown version). It has been rated as problematic. This issue affects an unknown code block of the component VMWARE VMXNET3 Paravirtual NIC Emulator. The manipulation as part of a Layer-2 Packet leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

QEMU (aka Quick Emulator) built with a VMWARE VMXNET3 paravirtual NIC emulator support is vulnerable to crash issue. It occurs when a guest sends a Layer-2 packet smaller than 22 bytes. A privileged (CAP_SYS_RAWIO) guest user could use this flaw to crash the QEMU process instance resulting in DoS.

The bug was discovered 01/04/2016. The weakness was published 12/29/2016 by Prasad J Pandit (Website). It is possible to read the advisory at git.qemu.org. The identification of this vulnerability is CVE-2015-8744 since 01/04/2016. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 35 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 88630 (Debian DSA-3471-1 : qemu - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124591 (Fedora Security Update for qemu (FEDORA-2016-890e612f52)).

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 (88630). Similar entries are available at 94716, 99588, 99589 and 99590.

Productinfo

Type

Name

License

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: 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: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88630
Nessus Name: Debian DSA-3471-1 : qemu - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703471
OpenVAS Name: Debian Security Advisory DSA 3471-1 (qemu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: git.qemu.org

Timelineinfo

01/04/2016 🔍
01/04/2016 +0 days 🔍
01/04/2016 +0 days 🔍
02/08/2016 +35 days 🔍
02/09/2016 +1 days 🔍
12/29/2016 +324 days 🔍
12/29/2016 +0 days 🔍
12/30/2016 +1 days 🔍
10/12/2022 +2112 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: git.qemu.org
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8744 (🔍)
SecurityTracker: 1034576
SecurityFocus: 79821 - QEMU 'net/vmxnet3.c' Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/30/2016 10:29
Updated: 10/12/2022 22:48
Changes: 12/30/2016 10:29 (67), 07/21/2019 19:00 (12), 10/12/2022 22:48 (5)
Complete: 🔍

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