Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 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.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7. Affected is an unknown function. Performing a manipulation results in input validation. This vulnerability was named CVE-2017-8585. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 (Programming Language Software). It has been classified as problematic. This affects an unknown code. 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 availability. The summary by CVE is:

Microsoft .NET Framework 4.6, 4.6.1, 4.6.2, and 4.7 allow an attacker to send specially crafted requests to a .NET web application, resulting in denial of service, aka .NET Denial of Service Vulnerability.

The bug was discovered 07/11/2017. The weakness was presented 07/11/2017 as KB4025344 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2017-8585 since 05/03/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 101366 (KB4025339: Windows 10 Version 1607 and Windows Server 2016 July 2017 Cumulative Update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91395 (Microsoft .NET Framework Security Update July 2017).

Applying the patch KB4025344 is able to eliminate this problem. The bugfix is ready for download at catalog.update.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101366) and SecurityFocus (BID 99432†). See VDB-103427, VDB-103432, VDB-103436 and VDB-103442 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Programming Language Software

Vendor

Microsoft

Name

.NET Framework

Version

License

free

Website

Vendor: https://www.microsoft.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.5
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.5
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: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 101366
Nessus Name: KB4025339: Windows 10 Version 1607 and Windows Server 2016 July 2017 Cumulative Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Multiple Vulnerabilites (KB4025344)
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: KB4025344

Timelineinfo

05/03/2017 🔍
07/05/2017 +63 days 🔍
07/11/2017 +6 days 🔍
07/11/2017 +0 days 🔍
07/11/2017 +0 days 🔍
07/11/2017 +0 days 🔍
07/11/2017 +0 days 🔍
07/12/2017 +1 days 🔍
01/01/2021 +1269 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: KB4025344
Researcher: David Fernandez
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8585 (🔍)
GCVE (CVE): GCVE-0-2017-8585
GCVE (VulDB): GCVE-100-103443

OVAL: 🔍

SecurityFocus: 99432 - Microsoft .NET CVE-2017-8585 Denial of Service Vulnerability
SecurityTracker: 1038864

See also: 🔍

Entryinfo

Created: 07/12/2017 10:44
Updated: 01/01/2021 07:10
Changes: 07/12/2017 10:44 (89), 10/24/2019 21:30 (4), 01/01/2021 07:05 (3), 01/01/2021 07:10 (1)
Complete: 🔍
Cache ID: 216::103

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