SB2015090805 - Vulnerabilities in Microsoft Office Could Allow Remote Code Execution
Published: September 8, 2015
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Memory corruption (CVE-ID: CVE-2015-2520)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when processing Excel documents. A remote attacker can create a specially crafted Excel file, trick the victim into opening it, cause memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of this vulnerability results in arbitrary code execution on the vulnerable system.
2) Memory corruption (CVE-ID: CVE-2015-2521)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when processing Excel documents. A remote attacker can create a specially crafted Excel file, trick the victim into opening it, cause memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of this vulnerability results in arbitrary code execution on the vulnerable system.
3) Memory corruption (CVE-ID: CVE-2015-2523)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when processing Excel documents. A remote attacker can create a specially crafted Excel file, trick the victim into opening it, cause memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of this vulnerability results in arbitrary code execution on the vulnerable system.
4) Memory corruption (CVE-ID: CVE-2015-2545)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when parsing malformed images. A remote attacker can create a file containing a specially crafted image file, trick the victim into opening it, cause memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of this vulnerability results in arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.
5) Cross-site scripting (CVE-ID: CVE-2015-2522)
The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-input. 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.