Microsoft Exchange Server 2013 CU21/2016 CU10 access control

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.
6.9$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Microsoft Exchange Server 2013 CU21/2016 CU10. This affects an unknown part. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2018-8265. The attack can be executed remotely. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Exchange Server 2013 CU21/2016 CU10 (Groupware Software). It has been declared as critical. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A remote code execution vulnerability exists in the way Microsoft Exchange software parses specially crafted email messages, aka "Microsoft Exchange Remote Code Execution Vulnerability." This affects Microsoft Exchange Server.

The bug was discovered 10/09/2018. The weakness was released 10/09/2018 by Sabri Haddouche with Wire Swiss GmbH as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated with the vendor. This vulnerability was named CVE-2018-8265 since 03/14/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. 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:

A remote code execution vulnerability exists in the way Microsoft Exchange software parses specially crafted email messages. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the system user. An attacker could then install programs; view, change, add, or delete data.

The vulnerability scanner Nessus provides a plugin with the ID 118008 (Security Updates for Exchange (October 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 53017 (Microsoft Windows Exchange Server Update For October 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 (118008) and SecurityFocus (BID 105491†). Entries connected to this vulnerability are available at VDB-54584, VDB-77886, VDB-125095 and VDB-125128. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 118008
Nessus Name: Security Updates for Exchange (October 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

03/14/2018 🔍
10/09/2018 +208 days 🔍
10/09/2018 +0 days 🔍
10/09/2018 +0 days 🔍
10/09/2018 +0 days 🔍
10/09/2018 +0 days 🔍
10/10/2018 +1 days 🔍
10/10/2018 +0 days 🔍
05/23/2023 +1686 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: Sabri Haddouche
Organization: Wire Swiss GmbH
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8265 (🔍)
GCVE (CVE): GCVE-0-2018-8265
GCVE (VulDB): GCVE-100-125116
SecurityFocus: 105491 - Microsoft Exchange Server CVE-2018-8265 Remote Code Execution Vulnerability
SecurityTracker: 1041836

See also: 🔍

Entryinfo

Created: 10/10/2018 12:39
Updated: 05/23/2023 14:56
Changes: 10/10/2018 12:39 (72), 04/01/2020 07:50 (7), 05/23/2023 14:56 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!