QEMU IP Header Length hw/net/vmxnet_tx_pkt.c vmxnet_tx_pkt_parse_headers memory corruption

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5.8$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU and classified as problematic. Impacted is the function vmxnet_tx_pkt_parse_headers of the file hw/net/vmxnet_tx_pkt.c of the component IP Header Length Handler. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2016-6835. The attack needs to be launched locally. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in QEMU (Virtualization Software) (the affected version is unknown) and classified as problematic. This vulnerability affects the function vmxnet_tx_pkt_parse_headers of the file hw/net/vmxnet_tx_pkt.c of the component IP Header Length Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.

The bug was discovered 12/09/2016. The weakness was published 12/10/2016 (Website). The advisory is shared for download at git.qemu.org. This vulnerability was named CVE-2016-6835 since 08/17/2016. The attack needs to be approached locally. A single authentication is needed 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 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). Similar entries are available at VDB-90368, VDB-91386, VDB-92520 and VDB-93311. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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: 93060258ae748573ca7197204125a2670047896d

Timelineinfo

08/17/2016 🔍
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
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6835 (🔍)
GCVE (CVE): GCVE-0-2016-6835
GCVE (VulDB): GCVE-100-94000
See also: 🔍

Entryinfo

Created: 12/10/2016 13:38
Updated: 10/05/2022 09:48
Changes: 12/10/2016 13:38 (62), 06/22/2019 17:47 (13), 10/05/2022 09:46 (6), 10/05/2022 09:48 (1)
Complete: 🔍
Cache ID: 216:B6B:103

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