Multiple vulnerabilities in Microsoft Exchange Server

Published: 2018-05-08 20:45:52 | Updated: 2018-05-08
Severity High
Patch available YES
Number of vulnerabilities 5
CVE ID CVE-2018-8154
CVE-2018-8151
CVE-2018-8159
CVE-2018-8152
CVE-2018-8153
CVSSv3 8.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
5.1 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CWE ID CWE-119
CWE-125
CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software Microsoft Exchange Server
Vulnerable software versions Microsoft Exchange Server 2013 Service Pack 1
Microsoft Exchange Server 2016 Cumulative Update 8
Microsoft Exchange Server 2013 Cumulative Update 19

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Vendor URL Microsoft

Security Advisory

1) Memory corruption

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper handling of objects in memory by Microsoft Exchange. A remote unauthenticated attacker can send a specially crafted email to a vulnerable Exchange server, trigger memory corruption and execute arbitrary code in the context of the System user.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8154

2) Out-of-bounds read

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The vulnerability exists due to improper handling of objects in memory by Microsoft Exchange. A remote unauthenticated attacker can send a specially crafted email to a vulnerable Exchange server, trigger out-of-bounds read and access sensitive information that can be used in further attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8151

3) Cross-site scripting

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The weakness exists due to insufficient sanitization of user-supplied data by Microsoft Exchange Outlook Web Access (OWA). A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8159

4) Cross-site scripting

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The weakness exists due to insufficient sanitization of user-supplied data by Microsoft Exchange Outlook Web Access (OWA). A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8152

5) Cross-site scripting

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The weakness exists due to insufficient sanitization of user-supplied data by Microsoft Exchange Outlook Web Access (OWA). A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8153

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