Microsoft Exchange Server up to 2016 CU8 Outlook Web Access Fake information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft Exchange Server 2010 SP3/2013 CU18/2013 CU19/2016 CU7/2016 CU8. Impacted is an unknown function of the component Outlook Web Access. The manipulation results in information disclosure (Fake). This vulnerability is known as CVE-2018-0940. It is possible to launch the attack remotely. No exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Exchange Server 2010 SP3/2013 CU18/2013 CU19/2016 CU7/2016 CU8 (Groupware Software). Affected is an unknown functionality of the component Outlook Web Access. The manipulation with an unknown input leads to a information disclosure vulnerability (Fake). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 03/13/2018. The weakness was published 03/13/2018 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2018-0940 since 12/01/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project. The advisory points out:

An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly sanitize links presented to users. An attacker who successfully exploited this vulnerability could override the OWA interface with a fake login page and attempt to trick the user into disclosing sensitive information.

The vulnerability scanner Nessus provides a plugin with the ID 108294 (Security Updates for Exchange (March 2018)), 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 53011 (Microsoft Windows Exchange Server Update For March 2018).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (108294) and SecurityFocus (BID 103323†). Similar entries are available at VDB-114571 and VDB-114579. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

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Exploitinginfo

Name: Fake
Class: Information disclosure / Fake
CWE: CWE-200 / CWE-284 / CWE-266
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: 108294
Nessus Name: Security Updates for Exchange (March 2018)
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: 🔍

Timelineinfo

12/01/2017 🔍
03/13/2018 +102 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/14/2018 +1 days 🔍
03/14/2018 +0 days 🔍
02/05/2021 +1059 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: @llt4l
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0940 (🔍)
GCVE (CVE): GCVE-0-2018-0940
GCVE (VulDB): GCVE-100-114570

OVAL: 🔍

SecurityFocus: 103323 - Microsoft Exchange Server CVE-2018-0940 Remote Privilege Escalation Vulnerability
SecurityTracker: 1040521

See also: 🔍

Entryinfo

Created: 03/14/2018 14:26
Updated: 02/05/2021 08:33
Changes: 03/14/2018 14:26 (74), 01/13/2020 15:34 (5), 02/05/2021 08:26 (4), 02/05/2021 08:33 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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