Microsoft Exchange Server 2016 CU8/2016 CU9 Outlook Web Access Web Request 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, has been found in Microsoft Exchange Server 2016 CU8/2016 CU9. This affects an unknown part of the component Outlook Web Access. This manipulation as part of Web Request causes input validation. The identification of this vulnerability is CVE-2018-8153. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in Microsoft Exchange Server 2016 CU8/2016 CU9 (Groupware Software). Affected by this vulnerability is an unknown functionality of the component Outlook Web Access. The manipulation as part of a Web Request 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 integrity. The summary by CVE is:

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests, aka "Microsoft Exchange Spoofing Vulnerability." This affects Microsoft Exchange Server.

The bug was discovered 05/08/2018. The weakness was shared 05/08/2018 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2018-8153 since 03/14/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests. An attacker who successfully exploited the vulnerability could perform script or content injection attacks, and attempt to trick the user into disclosing sensitive information. An attacker could also redirect the user to a malicious website that could spoof content or be used as a pivot to chain an attack with other vulnerabilities in web services.

The vulnerability scanner Nessus provides a plugin with the ID 109684 (Security Updates for Exchange (May 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 53014 (Microsoft Windows Exchange Server Update For May 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 (109684) and SecurityFocus (BID 104045†). The entries VDB-117499, VDB-117500, VDB-117503 and VDB-117560 are related to this item. Be aware that VulDB is the high quality 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: 4.8
VulDB Meta Temp Score: 4.7

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

NVD Base Score: 5.4
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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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: 🔍

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Nessus ID: 109684
Nessus Name: Security Updates for Exchange (May 2018)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

03/14/2018 🔍
05/08/2018 +55 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/09/2018 +0 days 🔍
05/10/2018 +1 days 🔍
05/10/2018 +0 days 🔍
03/11/2023 +1766 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8153 (🔍)
GCVE (CVE): GCVE-0-2018-8153
GCVE (VulDB): GCVE-100-117559
SecurityFocus: 104045 - Microsoft Exchange Server CVE-2018-8153 Spoofing Vulnerability
SecurityTracker: 1040850

See also: 🔍

Entryinfo

Created: 05/10/2018 11:50
Updated: 03/11/2023 13:51
Changes: 05/10/2018 11:50 (76), 02/04/2020 08:22 (4), 03/11/2023 13:51 (4)
Complete: 🔍
Cache ID: 216::103

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