Zero-day vulnerability in Microsoft Jet

Buffer overflow
CVE-2007-6026

The vulnerability initially had three CVEs: CVE-2005-0944, CVE-2007-6026 and CVE-2008-1092.
The issue has been introduced on 02/17/2000. The vulnerability was handled as a non-public zero-day exploit for at least 2832 days.

Known malware:

Trojan.Acdropper.C

Vulnerability details

Advisory: SB2008032101 - Remote code execution in Microsoft Jet

Vulnerable component: Microsoft Jet

CVE-ID: CVE-2007-6026

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-120 - Buffer overflow

Description:

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

The vulnerability exists due to boundary error in Jet database engine when parsing .mdb files. A remote attacker can create a specially crafted .mdb file, trick the victim into opening it and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: this vulnerability is publicly disclosed since 2005, however an attack vector was introduced only in 2008. The vulnerability is being actively exploited.

Public Exploits:

- Microsoft Jet Engine - '.MDB' File Parsing Stack Overflow (PoC) [Exploit-DB]

External links:

http://news.softpedia.com/news/Latest-Vulnerability-Attacks-Steer-Clear-of-Vista-SP1-but-Not-XP-SP3-...
https://www.symantec.com/security_response/writeup.jsp?docid=2008-032803-4407-99
https://co.norton.com/security_response/print_writeup.jsp?docid=2008-032619-5301-99
https://technet.microsoft.com/library/security/950627
https://technet.microsoft.com/library/security/ms08-028

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.