Zero-day vulnerability in Microsoft Excel

Buffer overflow
CVE-2006-1301

Vulnerability details

Advisory: SB2006071101 - Multiple vulnerabilities in Microsoft Excel

Vulnerable component: Microsoft Excel

CVE-ID: CVE-2006-1301

CVSSv3 score: 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

CWE-ID: CWE-119 - Memory corruption

Description:

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.

External links:

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

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.