Microsoft Exchange Server 2010 SP3/2013 CU16/2013 SP3/2016 CU5 OWA Request cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

A vulnerability was found in Microsoft Exchange Server 2010 SP3/2013 CU16/2013 SP3/2016 CU5 (Groupware Software). It has been classified as problematic. This affects an unknown function of the component OWA. The manipulation as part of a Request leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Microsoft Exchange Server 2010 SP3, Exchange Server 2013 SP3, Exchange Server 2013 CU16, and Exchange Server 2016 CU5 allows an elevation of privilege vulnerability due to the way that Exchange Outlook Web Access (OWA) handles web requests, aka "Microsoft Exchange Cross-Site Scripting Vulnerability". This CVE ID is unique from CVE-2017-8560.

The bug was discovered 07/11/2017. The weakness was published 07/11/2017 as KB4018588 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2017-8559 since 05/03/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue. The advisory points out:

An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly handle web requests. An attacker who successfully exploited this vulnerability could perform script/content injection attacks and attempt to trick the user into disclosing sensitive information.

The vulnerability scanner Nessus provides a plugin with the ID 101522 (KB4018588: Security Update for Microsoft Exchange Server), 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 53008 (Microsoft Windows Exchange Server Update For July 2017).

Applying the patch KB4018588 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 vulnerability database at Tenable (101522). Similar entries are available at 103426 and 103468.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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NVD Base Score: 6.1
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Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-74 / CWE-707
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 101522
Nessus Name: KB4018588: Security Update for Microsoft Exchange Server
Nessus File: 🔍
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OpenVAS ID: 802136
OpenVAS Name: Microsoft Exchange Server Multiple Vulnerabilities (KB4018588)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: KB4018588

Timelineinfo

05/03/2017 🔍
07/11/2017 +69 days 🔍
07/11/2017 +0 days 🔍
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07/11/2017 +0 days 🔍
07/11/2017 +0 days 🔍
07/12/2017 +1 days 🔍
07/13/2017 +1 days 🔍
12/31/2020 +1267 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: KB4018588
Researcher: Adrian Ivascu
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8559 (🔍)
OVAL: 🔍

SecurityTracker: 1038852
SecurityFocus: 99448 - Microsoft Exchange Server CVE-2017-8559 Remote Privilege Escalation Vulnerability

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Entryinfo

Created: 07/12/2017 10:38
Updated: 12/31/2020 17:20
Changes: 07/12/2017 10:38 (83), 10/24/2019 19:01 (4), 12/31/2020 17:16 (2), 12/31/2020 17:20 (1)
Complete: 🔍

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