SB2018050812 - Multiple vulnerabilities in Microsoft Exchange Server
Published: May 8, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Memory corruption (CVE-ID: CVE-2018-8154)
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.
2) Out-of-bounds read (CVE-ID: CVE-2018-8151)
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.
3) Cross-site scripting (CVE-ID: CVE-2018-8159)
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.
4) Cross-site scripting (CVE-ID: CVE-2018-8152)
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.
5) Cross-site scripting (CVE-ID: CVE-2018-8153)
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 update from vendor's website.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8154
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8151
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8159
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8152
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8153