QEMU hw/usb/hcd-ohci.c ohci_service_ed_list input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in QEMU. The affected element is the function ohci_service_ed_list of the file hw/usb/hcd-ohci.c. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2017-6505. The attack needs to be launched locally. No exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (affected version not known). It has been declared as problematic. This vulnerability affects the function ohci_service_ed_list of the file hw/usb/hcd-ohci.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

The ohci_service_ed_list function in hw/usb/hcd-ohci.c in QEMU (aka Quick Emulator) allows local guest OS users to cause a denial of service (infinite loop) via vectors involving the number of link endpoint list descriptors.

The bug was discovered 03/06/2017. The weakness was published 03/15/2017 by Li Qiang with 360.cn Inc. (oss-sec). The advisory is available at openwall.com. This vulnerability was named CVE-2017-6505 since 03/06/2017. Local access is required to approach this attack. A single authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 97804 (Fedora 25 : 2:qemu (2017-31b976672b)), 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 169868 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2017:1081-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu-project.org. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97804) and SecurityFocus (BID 96611†). Similar entries are available at VDB-97115, VDB-98162, VDB-98316 and VDB-122280. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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
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: 97804
Nessus Name: Fedora 25 : 2:qemu (2017-31b976672b)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for qemu FEDORA-2017-62ac1230f7
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: git.qemu-project.org

Timelineinfo

03/06/2017 🔍
03/06/2017 +0 days 🔍
03/06/2017 +0 days 🔍
03/15/2017 +9 days 🔍
03/15/2017 +0 days 🔍
03/16/2017 +1 days 🔍
03/18/2017 +2 days 🔍
03/20/2017 +2 days 🔍
10/15/2019 +939 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6505 (🔍)
GCVE (CVE): GCVE-0-2017-6505
GCVE (VulDB): GCVE-100-98170
SecurityFocus: 96611 - QEMU 'hw/usb/hcd-ohci.c' Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/16/2017 13:45
Updated: 10/15/2019 09:12
Changes: 03/16/2017 13:45 (81), 10/15/2019 09:12 (2)
Complete: 🔍
Cache ID: 216:A8F:103

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