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A Pretty Old Executable The recent Patch Tuesday brought, among other things, a new version of "old" Equation Editor, which introduced a fix for a buffer overflow issue reported by Embedi. The "old" Equation Editor is an ancient component of Microsoft Office (Office now uses an integrated Equation Editor), which is confirmed by looking at the properties of the unpatched EQNEDT32.EXE: We can see that File version is 2000.11.9.0 (implying being built in 2000), while Date modified is in 2003, which matches the time of its signature (signing modifies the file as the signat
Microsoft Office - OLE Remote Code Execution Exploit CVE-2017-11882: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ MITRE CVE-2017-11882: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11882 Research: https://embedi.com/blog/skeleton-closet-ms-office-vulnerability-you-didnt-know-about Patch analysis: https://0patch.blogspot.ru/2017/11/did-microsoft-just-manually-patch-their.html DEMO PoC exploitation: webdav_exec CVE-2017-11882 A simple PoC for CVE-2017-11882. This exploit triggers WebClient service
You should be extra careful when opening files in MS Office. When the world is still dealing with the threat of 'unpatched' Microsoft Office's built-in DDE feature, researchers have uncovered a serious issue with another Office component that could allow attackers to remotely install malware on targeted computers. The vulnerability is a memory-corruption issue that resides in all versions of Microsoft Office released in the past 17 years, including Microsoft Office 365, and works against all versions of Windows operating system, including the latest Microsoft Windows 10 Creators Update