Zero-day vulnerability in Microsoft Office

Memory corruption
CVE-2008-2463

Known malware:

JS/Exploit.CVE-2008-2463.A
Exploit kits using this vulnerability: Eleonore and Siberia.

Vulnerability details

Advisory: SB2008070701 - Remote code execution in Microsoft Access

Vulnerable component: Microsoft Office

CVE-ID: CVE-2008-2463

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 alows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to buffer overflow in the ActiveX control for the Snapshot Viewer for Microsoft Access. A remote attacker can construct a specially crafted Web page, 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.

Note: this vulnerability was being actively exploited.

Public Exploits:

- Snapshot Viewer for Microsoft Access - ActiveX Control Arbitrary File Download (Metasploit) [Exploit-DB]

- Microsoft Access - 'Snapview.ocx 10.0.5529.0' ActiveX Remote Exploit [Exploit-DB]

External links:

https://technet.microsoft.com/en-us/library/security/ms08-041.aspx
https://www.botnets.fr/wiki/CVE-2008-2463
https://blogs.technet.microsoft.com/msrc/2008/07/07/snapshot-viewer-activex-control-vulnerability/
http://www.kb.cert.org/vuls/id/837785
https://cve.circl.lu/cve/CVE-2008-2463
https://www.cnet.com/news/microsoft-fixes-26-flaws-with-11-patches-six-are-critical/

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.