#cve-2009-0238

#cve-2009-0238

[In] ShowDoc version before 2.8.7, an unrestricted and unauthenticated file upload issue is found and [an] attacker is able to upload a web shell and execute arbitrary code on server.

But are things getting worse? According to Register readers, and the company's own release health dashboard, the answer has to be yes. It isn't just you. The frequency of emergency out-of-band releases for the company's operating systems has been rapidly increasing to the point where, for every Patch Tuesday update, there'll likely be at least one out-of-band patch to fix whatever got broken.

This month, over half (55%) of all Patch Tuesday CVEs were privilege escalation bugs, and of those, six were rated exploitation more likely across Windows Graphics Component, Windows Accessibility Infrastructure, Windows Kernel, Windows SMB Server, and Winlogon. We know these bugs are typically used by threat actors as part of post-compromise activity, once they get onto systems through other means (social engineering, exploitation of another vulnerability).

The issue focuses on how Windows handles these directories for specific user sessions. Because the kernel creates a DOS device object directory on demand, rather than at login, it cannot check whether the user is an admin during the creation process. Unlike UAC, Administrator Protection uses a hidden shadow admin account whose token handle can be returned by the system when calling the NtQueryInformationToken API function.

Microsoft has issued an emergency patch designed to resolve a zero-day security vulnerability affecting several versions of Microsoft Office. Already exploited in the wild, the flaw could allow an attacker to skirt past Office's built-in security measures and send victims a malicious document. Zero-day vulnerability In a note published Monday, Microsoft revealed details behind the flaw, known as a Microsoft Office Security Feature Bypass Vulnerability.