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Microsoft's Jet Crash: Zero-day Flaw Drops After Deadline Passes

posted by takyon on Saturday September 22 2018, @01:55AM   Printer-friendly
from the jet-drag dept.

Bytram (from IRC) writes:

Microsoft's Jet crash: Zero-day flaw drops after deadline passes:

The Zero Day Initiative has gone public with an unpatched remote-code execution bug in Microsoft's Jet database engine, after giving Redmond 120 days to fix it. The Windows giant did not address the security blunder in time, so now everyone knows about the flaw, and no official patch is available.

The bug, reported to Microsoft on May 8 with a 120-day deadline before full disclosure, was described on Thursday by ZDI, here. It was discovered by Lucas Leong of Trend Micro Security Research.

The bad news: it's a remote-code execution vulnerability, specifically, an out-of-bounds memory write. The good news is that an attacker can only trigger the bug by tricking the victim into opening a specially crafted Jet file, and any arbitrary malicious code smuggled in the document is executed only with the user's privileges (we've all made sure that users don't have admin privilege, right?) The booby-trapped Jet file can also be opened using JavaScript, so someone could be fooled into viewing a webpage that uses JS to open the file, causing the code to run if it's picked up by the database.

The other good news is that the Jet database engine is not terribly well deployed: it's mostly associated with Microsoft Access and Visual Basic. However, if you are using it, you probably will want to stop users from opening any maliciously rigged files.

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  • (Score: 1) by khallow on Sunday September 23 2018, @04:06AM

    by khallow (3766) Subscriber Badge on Sunday September 23 2018, @04:06AM (#738761) Journal

    Khallow is a selfish megalomaniac who likes seeing the downtrodden get trampled by the rich and the powerful.

    No downtrodden or trampling in the scenario given. We're supposed to care because something freely given gets freely used by billionaires?

    Khallow desperately wants billionaire status for himself and trampling everyone else is his way to get there.

    That's why I post on SN. Lots of trampling opportunities here.

    Khallow is sick. Khallow needs to be put down.

    "We're sorry but your pet soylentil has contracted a terminal case of billionairitus. He'll keep biting ankles until someone gives him a billion dollars and that just isn't going to happen."