A remote code execution vulnerability has been found in Microslop Notepad
8 months ago by als to c/technology
They finally did it. Microsoft has successfully over-engineered a text editor into a threat vector.
This CVE is an 8.8 severity RCE in Notepad of all things.
Apparently, the "innovation" of adding markdown support came with the ability of launching unverified protocols that load and execute remote files.
We have reached a point where the simple act of opening a .md file in a native utility can compromise your system.
Windows used to come with notepad (raw text) and wordpad (basic markup). It would have made more sense to keep wordpad and add markdown to it instead so there would still be something that is just raw text.
I thought the Notepad > Wordpad > MS Word progression was pretty much perfect. A zero complication plaintext editor, something with a bit more formatting, and outright typesetting for print.
Granted I use a combination of Notepad++, Obsidian, and haphazard LaTeX venvs now so who am I to talk. I don’t represent most Windows users and especially not the Linux daily drivers. I’d like to think there’s still a lot of people in my situation.
It says a lot that none of the reasons I like Notepad++ were brought into Notepad when they changed it. A copilot button in the place where I write immediate notes and edit batch files? What could possibly be the use case? I just need it to be able to open massive text files and have a decent search UI and that’s it
I’m a huge proponent of LaTeX also, but I feel like it’s not that widely used outside of specific professional niches. The biggest issue I have with Word (and similar software) is the content generation and typesetting being forced into the same interface. It just breaks everything all the time. I’d much happier using word if it only allowed you to type in an Edit mode, and only allowed you to change fonts and layout and stuff in a View mode, and the View mode changes weren’t reflected live in the Edit mode.
I’ve had to use Office a lot professionally and I have to say you do get to learn its quirks over time if you’re stubborn enough to figure out what triggers each unexpected behavior. Ironically learning LaTeX really helped me figure out what’s happening internally in Word in some of those situations, just understanding how the breaks and spaces might be stored gives you a little extra insight.
AFAIK you can do something similar to what you’re describing in outline mode but I could be completely misremembering.
All the Office suite is bloated but LibreOffice still feels a long way off.
WordPad writes fairly clean rtf. Word writes incredibly bloated messy rtf. No, I don't want to use a .docx or .pdf generating library, I just wanna slap some strings together and have it come out ready to print yet editable by non techy users. I use wordpad to write my templates.
Pretty sure no type setter or graphic designer would use Word for anything else than making Word templates.
https://en.wikipedia.org/wiki/Markdown
Here's the context if anyone didn't make the link, like me
What even is the point of this comment?
The point is that I've seen several comments on other posts about this vulnerability, and in the body of this one, saying that Notepad is bloated and terrible now.
I'm offering a counterpoint that this is not necessarily bloat. It's debatable that this is the right tool to have this feature, but it can be a useful feature.
I'm fine with Markdown support, but I wish MS got the message about Copilot being unwanted. Not sure if they've added it to Notepad or not at this stage, but given all the places they've crammed it into I wouldn't be surprised.
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An attacker could trick a user into clicking a malicious link inside a Markdown file opened in Notepad, causing the application to launch unverified protocols that load and execute remote files.
"launching unverified protocols" - does that mean the network fetching is done by the Notepad app, and Notepad doesn't open the browser for this..? If so, bloody hell, Microsoft...
As I understood it, there can be specifically crafted links in Markdown documents, which, when clicked, will download a file and then execute it.
RCE means exactly this, the ability to run any code on a remote device (the one running notepad).
It's a parsing issue. I've encountered the same writing an MD parser for a website, not as trivial to solve as it seems. For a multi billion dollar company this is hilariously stupid. Why do I get the feeling someone vibecoded this entire implementation.
They admitted, IIRC, that they fired a bunch of devs and then used gen-AI to write code. I think I have a comment from last year around this time that this was gonna happen, including data breaches on a massive scale, when companies were openly touting this tactic. It's only getting started.
An attacker could trick a user into clicking a malicious link inside a Markdown file opened in Notepad
So you can give someone a Markdown file with a link to an application, and if they click the link the application runs.
Markdown supports links, yeah.
But Notepad doesn't, so it shouldn't render .md files, it should just show the markdown code.
They keep adding stuff to notepad that no one was asking for. Like tabs and saving on exit, which breaks the workflow of having notepad be a throwaway scratch pad.
Notepad saves on exit now? Wtf.
dude, Notepad even has Copilot now
I never upgraded downgraded to Win11 so I haven't seen a lot of this BS.
I... Have some really unfortunate news for you
Funnily enough, you used as an example the only new feature I actually like and rely on. I use it for things like PWs for shared service accounts (dont @ me, I know it's bad practice and our org does have a pw manager but these accounts aren't managed by it and I am not in control of them)
Also useful for things that are needed temporarily but I dont know how long that 'temporary' is going to be.
Good advice, but unfortuntlately my org is pretty strict about using unnaproved software and that's definitely not on the approved list lol
My god it's useless. It's the most limited markdown editor in the world. It lacks so much basic function that you would have to download an actual markdown editor if you were ever going to use it, so there's no point in notepad having the functionality, and then at the end of the day it's in a file format that basically doesn't exist outside of the web.
Microsoft Word cannot open it. So a Microsoft text editor program, can create a file that a different Microsoft text editor program can't read, despite markdown being a supposedly universal standard. Wow.
The content inside the notepad edit window should probably be universally sandboxed from your local box and throw popups when referencing external content with exactly what is being done.
They half assed the implementation.
To have something optimized they need to start from scratch with clean code
And honestly, that speaks more to the removal of features on the taskbar than Notepad.
One person could have rewritten Notepad from scratch in C++ in a day and bolted in Markdown in a relatively secure fashion in another 2. I doubt security even hit the requirements list. I'm not against moving windows components to Rust. I've not against losing features here and there to get there, but blatantly ignoring security because it's in Rust is downright stupid.
The content inside the notepad edit window should probably be universally sandboxed from your local box
Sadly, this was already the case when Notepad stayed in its lane and only handled plain text unicode.
Back in the year 2000 I was writing intranet apps for a big corporation, using Visual Basic and classic ASP (lol) and IE6 (lolol) for the UI. A very handy if not indispensable tool for this sort of work is the ability to View Source on the generated pages, which popped up the HTML in Notepad. One day for me this simply stopped worked entirely -- hitting View Source did nothing and I couldn't fix the problem on my computer no matter what I did (other people's computers still worked fine). I even switched to a different computer, set up all my tools and programs as normal, and got the same problem with View Source not working at all. I went like this for six months, and it was a real challenge to debug problems.
Eventually I discovered the problem from a forum post: I had a shortcut to Notepad on my desktop. For no reason I can possibly imagine, this prevented View Source from doing anything at all. It didn't even have to be a shortcut to Notepad proper; any shortcut that happened to be named "Notepad" would cause the break even if it was a shortcut to some other program. Renaming my shortcut to "NotepadX" fixed the problem. I would LOVE to have some old MS engineer explain to me what the living fuck was going on here.
The search order would end up finding your shortcut first.
Sure, but in my case "Notepad" was a shortcut to actual Notepad.exe. It still should have worked.
That has to be some kind of special exception in IE6 that they were doing for debugging, and they failed to remove it. Crazy.
Another day another Microslop nonsense
Lol. Your second sentence should be the headline of this news.
I miss oldskool Notepad being present on the system. Win11 Notepad is a worthless piece of shit.
But ... any computer or vm that I use for more than a few hours gets a copy of Metapad.
I've been using Metapad for ... umm ... decades.
Metapad is a simple, extremely lightweight editor, intended to just barely be better than Notepad, fixes a lot of shit that MS never did and stays simple.
https://liquidninja.com/metapad/
I've been a long time user of Notepad++ after Notepad started inserting random whitespace characters in files, which messed up some jankety scripting I was doing at the time. Do you happen to know if Metapad is good about not adding unintended characters like that?
Yes. Metapad is too dumb for that shit. By design.
It's only barely smart enough to be better than Notepad.
It's not smart enough to do anything dumb.
Its free, extremely mature, and you already know how to use it.
Metapad is a feature-for-feature drop-in replacement for Notepad.
Thanks! I'll check it out 🍻
I use EditPadLite and have done for a loong time. It has regex find and replace, is fast and you can tell it to display word wrapped or not, numbered lines or not, font, size, colours, syntax highlighting scheme, all based on file extensions. I have it as my default text editor and for all kinds of other files as well as text.
If I want to do major coding, I fire up the IDE and choose from my recent projects, but if I want to quickly edit some xml or a single source file, I double click it and edit it in EditPadLite.
This is the first I've heard of EditPadLite. From a cursory examination of their site, it appears to be written with the same general design philosophy as Metapad, albeit not as low profile. I'll give it a tentative thumbs up.
The EditPadLite download is 18mb. My copy of Metapad is 190k. Small and fast.
The only time it's ever in the least bit slow to load is when it's on a onedrive folder at work and Microsoft don't cache it locally so there's a delay getting the thing in the first place.
Does metapad have regex find and replace? If so, smaller and even faster is appealing.
Ah. Yes, it appears I've been using the ESU option. That was the simplest thing to do.
I use the registration utility from massgrave, added 3 years to my registration.
https://massgrave.dev/windows10_eol
But right there on that page, they cover Windows 10 IoT Enterprise LTSC 2021.
It sounds like that's what I need. Stripped down Win10. I like that idea.
Thanks, friend.
Quick! Delete the System32 folder!
Blursed
For non-techies, this like fucking up making a set of alphabet blocks or a picture of a rainbow.
There's always wannabes.
Microsoft recently added Markdown support so it can handle things like bold text, links, and images.
But in doing that, they accidentally created a problem where a malicious text file could hide a link inside it. When you open the file, Notepad might follow that link, which could then download and run harmful code on your system.
So now, in the worst case, just opening what looks like a normal text file could put your computer at risk.
Thanks Microsoft.
Can you elaborate a bit on how notepad following a link can result in running arbitrary code? Cause it sounds more like a second vulnerability is involved, because a text editor following a link still shouldn't result in running whatever code is on the other side of the link.
Though it is a privacy issue on its own, just like a tracking pixel or images in emails.
I'm also curious what the actual use case is for having a link that notepad automatically follows on load in markdown. Or why they got rid of wordpad (their default rich text editor) and put it into notepad (their plain text editor), ruining one of the reliable things about notepad: it would just show you the actual bytes of the file, whether it was text or not, kinda like a poor man's hex editor (just without the hex).
Makes me wonder if eventually opening an html file in notepad will make it render it like a browser. "Back in my day, we edited html in notepad instead of browsed it!"
Yeah I get your thought process, but the second vulnerability is actually just how Windows is designed to work. When Notepad follows a link, it isn't opening a web page, it's passing a command directly to the OS shell.
Because Notepad is a trusted native application, it bypasses many of the security checks that a browser has.
If the link uses the file:// protocol to point to an .exe on a remote server, or ms-appinstaller to trigger an install, the OS treats that as a direct instruction to launch that software, so it can trigger an app installation prompt or, depending on the exploit, silently side-load malicious packages.
I can't think of any good reason why links opened via notepad should be treated as trusted. Or any remote exe being treated as trusted regardless of what program is trying to open it, including the windows app store. If anything, the default behavior should be to download the file or open a prompt. I'd call that the second flaw.
Glad to be away from that platform.
Great! That is the prefect question to ask and at the most appropriate time! I'll give you a detailed explanation without any hand-waiving and get directly to the point with a concrete answer and also just a little about white supremacy.
Microslop leads to macroflop.
Or the same risk as just clicking on random links.
Paint Classic
Text modified from https://hachyderm.io/@pheonix/116050795790003647
It qualifies for c/aboringdystopia imo
I use an older version. Am I ok?
If you're still on windows 10, notepad is fine, but you might not be getting security updates for the whole OS. If you're on windows 11, notepad is annoying, bloated, has AI, and is a security risk. Also the OS updates you are getting might well be written by AI, and we all know how infallible AI is, right?
Yeah, still on Win10. I'm in the process of building a new computer right now. It will be duel boot, in Linux/ Win11. I intend to continue using my old Win10 machine though for some things. I'll leave it offline.
it's spiral bound, college ruled, uh, smells of cat hair
I HATE that the industry started calling these RCE (specifically "passive" RCE). It really muddies the waters.
This isn't a normal RCE where an attacker can remotely connect in and execute code. Those are very serious.
This is a passive RCE. Basically code injection from inappropriately parsing a file. And it doesn't need to be remote. You can use a local file.
That's the opposite of how I would understand it though. If you said a passive RCE I would understand that as it being run without me doing anything - in this case, just having notepad open making me vulnerable.
User interaction required was listed on the MSRC source, but that's also where "RCE" came from too.
Microsoft is so fucking stupid
This is the way now...
@lemmy.world
go to feed...
@lemmy.world
go to feed...
To be fair, markdown is a very cool standard.
While I don't know if it really makes sense for Notepad to be anything other than a plain-text editor, there are better tools for that, supporting markdown is kind of nice.
This means you have support for it on fresh Windows installs, which could be good for virtual machines. That said, Markdown is intrinsically pretty readable without formatting anyway.
It's a shame they flubbed the implementation though...
save