SB2006071101 - Multiple vulnerabilities in Microsoft Excel

Description

This security bulletin contains information about 8 secuirty vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2006-2388)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed Excel file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

2) Buffer overflow (CVE-ID: CVE-2006-1309)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed LABEL record within Excel file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

3) Buffer overflow (CVE-ID: CVE-2006-1308)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed FNGROUPCOUNT value file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

4) Buffer overflow (CVE-ID: CVE-2006-1306)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed OBJECT record within Excel file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

5) Buffer overflow (CVE-ID: CVE-2006-1304)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed COLINFO record within Excel file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

6) Buffer overflow (CVE-ID: CVE-2006-1302)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed SELECTION record within Excel file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

7) Buffer overflow (CVE-ID: CVE-2006-1301)

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

The vulnerability exists due to incorrect handling of input data when processing a malformed SELECTION record within Excel file. A remote unauthenticated attacker can trick the victim to open a specially crafted Excel file and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

Note: this vulnerability was being actively exploited.

8) Remote code execution (CVE-ID: CVE-2006-3059)

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

The weakness is due to a stack-based buffer overflow in the HrShellOpenWithMonikerDisplayName() function. By persuading the victim to open a specially crafted Excel file, a remote attacker can cause DoS conditions or execute arbitrary code via a long hyperlink.

Successful exploitation of the vulnerability results in denial of service or arbitrary code execution on the vulnerable system.

Note: this vulnerability was being actively exploited.

Remediation

Install update from vendor's website.

References

• https://technet.microsoft.com/en-us/library/security/ms06-037.aspx