Vulnerability identifier: #VU1263
Vulnerability risk: High
CVSSv3.1: 8.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-119
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Microsoft Office for Mac
Client/Desktop applications /
Office applications
Microsoft Excel
Client/Desktop applications /
Office applications
Excel Viewer
Client/Desktop applications /
Office applications
Vendor: Microsoft
Description
The vulnerability alows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to a boundary error when loading application data into memory. A remote attacker can create a specially crafted Excel file with rich text values, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system with privileges of the current user.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.
Mitigation
Install update from vendor's website:
Excel 2000 Service Pack 3:
https://www.microsoft.com/downloads/details.aspx?FamilyId=f7f90c30-1bfd-406b-a77f-612443e30185
Excel 2002 Service Pack 3:
https://www.microsoft.com/downloads/details.aspx?FamilyId=907f96d5-d1e9-4471-b41c-3ac811e63038
Excel 2003 Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?FamilyId=296e5f2c-f594-41c8-a20a-3e4c40ae3948
Microsoft Office Excel Viewer 2003:
https://www.microsoft.com/downloads/details.aspx?FamilyId=280bb2ac-b21a-46b5-8751-5a50fbebf107
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats:
https://www.microsoft.com/downloads/details.aspx?FamilyId=e9251d71-9098-4125-ae91-7d4c83ea58ad
Microsoft Office 2004 for Mac:
https://www.microsoft.com/downloads/details.aspx?FamilyId=95DCEB37-B35F-46DB-B280-DB0F3B298AA9
Microsoft Office 2008 for Mac:
https://www.microsoft.com/downloads/details.aspx?FamilyId=8FE8C32A-6D7A-482B-97C6-42562F089EE4
Vulnerable software versions
Microsoft Office for Mac: 2004 - 2008
Microsoft Excel:
Excel Viewer:
External links
http://technet.microsoft.com/en-us/library/security/ms08-014.aspx
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.