Microsoft SharePoint Enterprise Server 2016 Web Request access control

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft SharePoint Enterprise Server 2016. This affects an unknown part of the component Web Request Handler. Such manipulation leads to access control. This vulnerability is uniquely identified as CVE-2017-11936. The attack can be launched remotely. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft SharePoint Enterprise Server 2016 (Groupware Software) and classified as critical. Affected by this issue is an unknown functionality of the component Web Request Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Microsoft SharePoint Enterprise Server 2016 allows an elevation of privilege vulnerability due to the way web requests are handled, aka "Microsoft SharePoint Elevation of Privilege Vulnerability".

The bug was discovered 12/12/2017. The weakness was disclosed 12/12/2017 as KB4011576 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is handled as CVE-2017-11936 since 07/31/2017. The attack may be launched remotely. The successful exploitation needs a simple authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server.

The vulnerability scanner Nessus provides a plugin with the ID 105190 (Security Update for Microsoft SharePoint Server 2016 (December 2017)), 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 110309 (Microsoft Office and Microsoft Office Services Security Update December 2017).

Applying the patch KB4011576 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 (105190) and SecurityFocus (BID 102068†). The entry VDB-110550 is pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 105190
Nessus Name: Security Update for Microsoft SharePoint Server 2016 (December 2017)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: KB4011576

Timelineinfo

07/31/2017 🔍
12/12/2017 +134 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/13/2017 +1 days 🔍
01/27/2021 +1141 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: KB4011576
Researcher: Ashar Javed
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-11936 (🔍)
GCVE (CVE): GCVE-0-2017-11936
GCVE (VulDB): GCVE-100-110552

OVAL: 🔍

SecurityFocus: 102068 - Microsoft SharePoint CVE-2017-11936 Privilege Escalation Vulnerability
SecurityTracker: 1039995

See also: 🔍

Entryinfo

Created: 12/13/2017 08:01
Updated: 01/27/2021 08:48
Changes: 12/13/2017 08:01 (77), 12/14/2019 08:52 (5), 01/27/2021 08:43 (2), 01/27/2021 08:48 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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