It seems kind of weird, like on top of the technical details it is describing some still-in-progress argument with the 7zip folks about who is responsible for the bug. DHowett 58 days ago parent prev next [—]. I don't think it does. I am failing to see 1. It seems when you drop a file into the help viewer window, it is handled by the help viewer itself.
You can try it with a random file. It either displays the file inside the help viewer as an HTML file, or a Internet Explorer-like download dialog shows up. It seems that 7-zip opens the. How does this privilege escalation actually work? What does it have to with 7zip, again?
If there is a privilege escalation vulnerability in Windows Help Viever then nobody can stop anyone from writing a payload that mimicks the heap overflowing code in 7zip.
But of course that doesn't get you clicks so why not bait everyone by attaching name of a popular open source software to it. Torvalds was spot on about security researchers. What did he say about security researchers? He has commented about security researchers and industry on several times over the years, but to sum it up we can say he doesn't think of very highly of them :p. I don't understand security stuff really the computer misbehaves frequently enough when I'm not trying to do evil things to it, why would I try to make it worse?
Why does 7zip even have admin privileges to give away, in the first place? It seems to be based on some odd interaction with the help system but I can't really parse the description. I think this is a reference to a conversation with the people behind 7-zip? It seems like a weird mix of technical details and finger-pointing. Program that opens help files with the chm extension. It is possible to see vulnerabilities such as XXE or command execution in every program that uses the hh.
Seems like a pretty solid argument from the 7zip folks, right? They can't really be blamed if the Windows help system has decided to give them root for some reason. And since 7zip is partially open source, any would-be hacker could just grab an old version of the code if they wanted to weaponize this, right? But maybe there's something I'm missing.
Windows privilege escalation bugs are so unbelievably common. We just fixed one in our MSI installer, and when I went to search for the CVE there were like 10 recent ones from different things including various VPN clients and shell extension apps.
The culprit is usually the insane Windows ACL permission system. If you are depending on its local user permission access control to be anything more than advisory you are going to have a bad time. GordonS 58 days ago parent next [—]. While your last paragraph is technically true, ACLs can also be applied on files from network shares.
And of course just as on Linux , even on single, non-networked machines, only very technical users will realistically be able to access files they are not authorised for. It may be more capable but that comes at a high cost in terms of usability, bugs, and vulnerabilities. Complexity is generally bad for security especially when the system doesn't seem well designed to manage it.
Lets not pretend UNIX doesn't have enough of their own, specially with setuid exploits. Windows beats Unix variants by at least on local privilege escalation bugs. Not sure about that, but If we're talking about desktops systems, privesc is trivial in either OS.
On Windows UAC isn't even intended to be a barrier. If we're talking about servers, I'm not sure that Windows is worse on privescs. I'd say the main intention of UAC is to make sudo but without obvious vulnerabilities.
The UAC dialog is wired deep into the system and you can't fake it. It takes priority over any UI stuff and won't accept input from a program you didn't specifically authorize which requires accepting a UAC prompt. On the flipside, all it takes to manipulate sudo on Unix systems is to write a TTY emulator that just middlewares between the user and sudo.
Then just alias via bashrc or any number of other places that can prompt for a user password. There is not protection sudo can deploy against that. Polkit helps a bit but X11 isn't great at helping there either since other programs can just send keystrokes. I'm just saying that Microsoft has stated that UAC is not intended to be a privilege boundary. It is a clear privilege boundary, just not a barrier.
Crossing that divide requires a user interaction. UAC can be a barrier if it would display more about the programs intention. Similar sudo could be improved the same way. No, that's not correct. The reason it's not a barrier and not a boundary is because there are universal bypasses. Where is the statistic proving that? CVE database is pretty much alike. You're absolutely correct about the Windows ACL system. The discretionary access control system in Windows can easily be subverted by a poorly configured dynamic access control policy.
Windows is not a single-user OS. Even a standard "desktop" installation can support multiple sessions through terminal services, but usually it is not configured to allow multiple concurrent interactive sessions. Pxtl 58 days ago prev next [—]. This looks more like a bug in Windows help system than 7zip. At least it's easy to avoid, although dragging and dropping files in 7zip is an expected operation, I don't think people are opening their "help" often.
I wonder how many programs have this bug? How many programs have Windows help and involve dragging and dropping files? Kwpolska 58 days ago parent next [—]. This involves dragging-and-dropping files onto the Help window, not 7-zip proper.
This reminds me slightly of the recent Razer 0day [1] when plugging in a mouse. Seems like a big with MS help viewer more than 7z. Only on Windows, apparently. It wasn't even modified after the AES implementation was found to be somewhat lacking. No patch yet, apparently. Is it better? Super problematic that the HN mod team removed these posts by the author. The first line tells it to run the actions when the F4 is pressed.
You can change the key by editing the first line. The modifier keys are as follows:. Win Windows logo key! I suggest checking out the tutorial page. This isn't a hotkey as such but can be accomplished entirely on the keyboard and doesn't require any programs or system changes:.
Now the whole dropdown menu is accessible on every WindowsExplorer Window at the very, very top left of the window. Now whenever you need to open a WinExplorer window, you can add a Text File or other stuff with just 2 klicks. For Win10 not tested on older Operating Systems Hope this helps somebody. I use QTTabBar. Open QTTabBar options. Keyboard Shortcuts. Scroll down to Create a new txt file. Highlight and change it to F8 or any other.
In explorer press F8 and it creates "New Text Document". Sign up to join this community. The best answers are voted up and rise to the top.
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How to create a new text document TXT file by a Hotkey? Ask Question. Asked 5 years, 11 months ago. Modified 1 year, 5 months ago.
Viewed 64k times. OS: Windows Windows Explorer. No matter what the Keyboard Layout is Maybe this can help "Create new text document" option missing from context menu.
Improve this question. Community Bot 1. Stamimail Stamimail 2 2 gold badges 4 4 silver badges 8 8 bronze badges. Half of the answer might include: pin Notepad to the start menu via right click -- pin to start menu. After that, click on the new Notepad entry on top of the start menu and choose Properties. In the Shortcut tab, hit the mouse cursor into the Shortcut Key box and press your chosen hot key, e. Close the properties windows with "OK".
After that, Notepad will be started after you press ctrl-alt-n. However, if you hit File - Save as Thank you for your answer, but the question is about, how to name the txt file before you open it for editing - a Hotkey for this. You should clearly state what OS OS family and file manager you are talking about. I can guess it's Windows and its native explorer.
A tag will be useful. Another hint: fsutil file createnew emptyfile. Although not a hotkey. Add a comment. Sorted by: Reset to default. Highest score default Date modified newest first Date created oldest first.
English Chinese Simpl. Chinese Trad. Yes, 7-Zip is free software. You can use it on any computer. You don't need to register or pay for 7-Zip. You must run 7-Zip File Manager in administrator mode. Right-click the icon of 7-Zip File Manager, and then click Run as administrator. Then you can change file associations and some other options. New versions of 7-Zip starting from version You can get big difference in compression ratio for different sorting methods, if dictionary size is smaller than total size of files.
If there are similar files 7zip context menu missing windows 10 free different folders, the sorting "by type" can provide better compression ratio in some cases. Note that sorting "by type" has some drawbacks. For example, NTFS volumes use sorting order "by name", so if an archive uses another sorting, then the speed of some operations for files with unusual order can fall on HDD devices HDDs have low speed for "seek" operations.
If you think that unusual file order is not problem for you, and if better compression ratio with small dictionary is more important for you, use ' qs ' mode. Other ZIP programs can open some archives with incorrect headers, since these programs just ignore errors. If you have such archive, please don't call the 7-Zip developers about it. Instead try to find the program that was used to create the archive and inform the developers of that program that their software is not ZIP-compatible.
But latest versions of 7-Zip supports RAR5 archives. Only Windows Explorer knows exact drop target. And Windows Explorer needs files drag source as decompressed files on disk. So 7-Zip extracts files from archive to temp folder and then 7-Zip notifies Windows Explorer about paths of these temp files. Then Windows Explorer copies these files to drop target folder.
To avoid temp file usage, you can use Extract command of 7-Zip or drag-and-drop from 7-Zip to 7-Zip. You can change current folder to folder that is common for all files that you want to compress and then you can use relative paths:. Also that block of 2 GB can be fragmented for example, by some DLL fileso 7-Zip can't allocate one big contiguous block of virtual space. There are no such limitations in bit Windows. So you can use any dictionary in Windows x64, if you have required amount of physical RAM.
These options are case-sensitive. There are some possible cases when archive is corrupted: You can open archive and you can see the list of files, but when you press Extract or Test command, there are some errors: Data Error or CRC Error. When you open archive, you get message "Can not open file 'a.
Read about recovering procedure: Recover corrupted 7z archive. Some files also require a new Platform SDK from microsoft. Yes, but you are required to specify in your documentation 1 that you used parts of the 7-Zip program, 2 that 7-Zip is licensed under the GNU LGPL license and 3 you must give a link to www.
One way is to use the 7z. The 7za. It, however, doesn't use standard COM interfaces for creating objects. A full example is 7-Zip itself, since 7-Zip works via this dll also.
7zip context menu missing windows 10 free are other applications that use 7za. Any other code in your application can be licensed as you wish. That is the idea of free software. Copyright C Igor Pavlov. Why 7z archives created by new version of 7-Zip can be 7zip context menu missing windows 10 free than archives created by old version of 7-Zip? Old version of 7-Zip before version New version of 7-Zip supports two sorting orders: sorting by name - default order.
You can increase compression ratio with the following methods: Increase dictionary size. 7zip context menu missing windows 10 free can help when 'qs' is not used.
Specify ' qs ' in Parameters field or use -mqs switch for command line version. Why can't 7-Zip open some ZIP archives? Why can't 7-Zip open some RAR archives? Why does drag-and-drop archive extraction from 7-Zip to Explorer use temp files?
Why doesn't the command line version add files without extensions to an archive? Why doesn't -r switch work as expected? In most cases you don't need -r switch. Example 1: 7z. Example 2: 7z. How can I store full path of file in archive?
How can I install 7-Zip 7zip context menu missing windows 10 free silent mode? How can I recover corrupted 7z archive? How can I add support for 7z archives to my application? The other way is to call the command line version: 7za. Can I use the source code of 7-Zip in a commercial application?