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AnIdiotOnTheNet 6 months ago. People keep knocking xterm but honestly it still is probably the best and most complete terminal emulator. Ubuntu bug Created: It also provides the VtePTY object containing functions for starting a new process on a new pseudo-terminal and for manipulating pseudo-terminals. Their security practices become useless if the scrollback buffer is written to disk in plain text. High depending on use and expectations Software: I discovered this issue in November of while talking about uses for the lsof command on the climagic Twitter account.

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It's not like they don't already have the code for one just lying around. I discovered this issue in November of while talking about uses for the lsof command on the climagic Libvhe account. LXTerminal doesn't get all the blame though, DOSBox devs should know better than to use a terminal emulator with all its in-band signaling fail and instead create a new non-terminal console window.

Testing and reproducing the issue: Recommended fix for users: It also provides the Lobvte object containing functions for starting a new process on a new pseudo-terminal and for manipulating pseudo-terminals. However due to the wide variety of ways in which people implement security on their systems, knowledge of this issue is essential to everyone who uses one of these affected terminal emulators. Daniel Gillmor libtve this security issue up with the libvte developer Behdad Esfahbod, in June of in bugbut didn't seem to convince Behdad that the code needed to be changed.

By writing scrollback data to disk, you're breaking any program that relies on the data displayed in the terminal not being written to disk, such as any console based password manager, gpg, libte volume, etc. Any data that you have accessed through your terminal using one of these programs should be considered breeched.

In case it helps anyone: It can be viewed at: In my professional opinion, security of the data in the terminal is paramount.

Terminal emulator widget for GTK+ 3.0 - development files

Consider previous computers you have used and disposed of or sold, hard drives you've replaced, etc. Shred by default will overwrite a file 3 times with patterned and random data.

Set your keyboard autorepeat to 60Hz, hold down a key in a libvte-based terminal, linvte watch how bad it is. I'd recommend urxvt, Eterm or xterm. Don't try to fix the data breech issue libvtf filling up the filesystem with a large file and then overwriting it with 0s or using the shred command on it.

Use other terminal emulators that do not use libvte. Hacker News new past comments ask show jobs submit.

climagic bug report - libvte scrollback buffer written to disk

By writing data to disk in any way unknown to the end user, you are violating a trust that users have had libvtw terminals for decades. The response so far has been that the developer doesn't consider this a bug. Open one of the affected terminal emulators. You could also use the shred command in place of dd in the previous steps. I was giving these people a bit of time to respond or resolve the issue, but apparently that isn't going to happen without making a bigger deal of it.

High depending on use and expectations Software: I immediately found which software was the culprit and submitted a bug reports to Gnome's Bugzilla.

Terminal latency libvte is a major offender here. I do not recommend konsole because it has the same issue with writing scrollback buffer to disk. In a sense, this bug is allowing the data to "break the forth wall".

It encodes the data so it is not as visible, but it would be trivial to decode that data. The developer proposed plans to use an in memory encryption key on the data on disk, which may be acceptable. AnIdiotOnTheNet 6 months ago. There have been a few posts in recent months in this bug report about seeing if something can be done in the kernel, but the two developers discussing it seem to be convinced that it's OK to write this data to disk.

Recommended fix for developers and distribution implementors: If the current method remains in place then I think a very strong warning should be placed next to the scrollback buffer setting in the terminal emulator explaining that data will end up on disk.