[Bug 215034] Re: add /dev/tcp/... support
I'm confused, it says in the changelog that enable net extensions per update #9, yet with the following installed: ii bash4.0-5ubuntu2 The GNU Bourne Again SHell ii bash-builtins 4.0-5ubuntu2 Bash loadable builtins - headers examples ii bash-completion 1:1.0-3ubuntu2 programmable completion for the bash shell ii bash-completion-lib 1.3.1-2 programmable completion for the bash shell ii bash-doc4.0-5ubuntu2 Documentation and examples for the The GNU B ii bash-minimal4.0-5ubuntu2 The GNU Bourne Again SHell (minimal version) ii bash-static 4.0-5ubuntu2 The GNU Bourne Again SHell (static version) ii bashdb 4.0.0.2-1 BASH debugger ii mybashburn 1.0.2-1 Burn data and create songs with interactive There still appears to be no /dev/tcp support. ** Changed in: bash (Ubuntu) Status: Fix Released = Confirmed -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
Sorry to reopen a closed bug. This is in fact fixed in Karmic 9.10 status changed back. ** Changed in: bash (Ubuntu) Status: Confirmed = Fix Released -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
exec 3/dev/tcp/www.google.com/80 echo -e GET / HTTP/1.1\n\n3 cat 3 Will in fact get you the index page from google. However you won't see a /dev/tcp if you look in /dev it is intercepted by bash itself. Also worth noting that bash is not the default shell in ubuntu 9.10, it is dash. /bin/bash is where the binary for the shell is located strings /bin/bash | grep -iE tcp|udp /dev/tcp/*/* /dev/udp/*/* -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
Just in case anyone ever lobbies to disable /dev/tcp in Bash again, I want to add my support to leaving it enabled. Lots of languages have features which are dubious at best (leading zero means octal, for example), but distributions tend to leave those features in place because the languages are already widely used. Because of Ubuntu, some of my Bash scripts have already been (in effect) split into two versions -- one for older Ubuntu distributions, and one for Red Hat everything else. Granted, this sort of split is all too common, and caused by far more than just /dev/tcp support. The point remains that anytime a distributor second-guesses a language implementation decision, it means that programs which have worked correctly for years on multiple systems will suddenly stop working on your distribution. I agree that there are times when backward compatibility must give way to modern security, but breaking existing programs should be a method of last resort. Instead, we have an opinion that a long-standing language feature would have been better handled by an external program, and an accusation that improper usage of the feature can lead to unexpected results. That is nowhere near a strong enough argument to merit breaking existing programs which work just fine on several other platforms. -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
It's not fixed at all! It's not released at all! As of Ubuntu 9.04 (jaunty). -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
I confirm the /dev/tcp is not in place as of Jaunty, -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
This bug was fixed in the package bash - 4.0-4ubuntu1 --- bash (4.0-4ubuntu1) karmic; urgency=low * Merge with Debian; remaining changes: - Build from the upstream sources, build the documentation in info format. - /etc/skel/.bashrc: eval lesspipe. * Changes to the skeleton .bashrc: - Source .bash_aliases after defining aliases. LP: #400686. - Enable color support for grep. LP: #386502. * The bash docs now describe uname -s not having any effect on many systems. LP: #378595. * Don't ship an info dir file. LP: #358932. * Fix some lintian warnings. bash (4.0-4) unstable; urgency=low * Apply upstream patches 024 - 028. - patch 028 closes: #519165. bash-4.0 reverted to the historical shell behavior of raising an error when $@ or $* was expanded after `set -u' had been executed and there were no positional parameters. The Posix working group has since clarified the standard's position on the issue, and $@ and $* are now the only variables, parameters, or special parameters that do not raise an error when unset if set -u is enabled. * Enable net redirections, now that bash isn't the default shell anymore. LP: #215034. * Changes to the skeleton .bashrc: - Fix example lines in /etc/bash.bashrc to enable bash completion. Closes: #523706, #522857. - Don't export HISTCONTROL in bashrc. Closes: #540371. - Support user dircolors settings in ~/.dircolors. Closes: #506213. bash (4.0-3) experimental; urgency=low * Apply upstream patches 011 - 024. bash (4.0-2) experimental; urgency=low * Apply upstream patches 001 - 010. Closes: #518289. * Fix insecure temp file handling in examples scripts. Closes: #509279. * /etc/skel.bashrc: Only source bash_completion, if posix mode is turned off. Closes: #498474. bash (4.0-1ubuntu1) jaunty; urgency=low * Merge with Debian; remaining changes: - Build from the upstream sources, build the documentation in info format. - /etc/skel/.bashrc: eval lesspipe. bash (4.0-1) experimental; urgency=low * New upstream version 4.0. bash (4.0-0ubuntu1) jaunty; urgency=low * New upstream version 4.0 beta. -- Matthias Klose d...@ubuntu.com Mon, 24 Aug 2009 12:06:59 +0200 ** Changed in: bash (Ubuntu) Status: Triaged = Fix Released -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
also +1. also, why isn't there a feature in launchpad to just let me vote +1 on this? ;) (is there?) -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
Here here. There maybe some reason for not having this feature but the stated motivations are not it. +1 for adding /dev/tcp. -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
Another request to fix this. It is a really simple fix, it only needs to remove the --disable-net-redirections configure option added by Debian and bring bash closer to what it was intended to be by its developers. The Debian maintainer gave this justification in /usr/share/doc/bash/README.Debian.gz : 9. Why is bash configured with --disable-net-redirections? It can produce completely unexpected results. This kind of feature should not be part of a shell but a special tool. And that tool has existed for years already, it's called netcat. In my opinion, this is completely unreasonable. The first argument, that It can produce completely unexpected results is just plain wrong. It is precisely documented, the names were chosen in order to not conflict with real files (no known unix system have /dev/tcp or /dev/udp hierarchies), and is part of the expected features of bash. The second argument, that This kind of feature should not be part of a shell but a special tool. is also invalid. Anyone who used both netcat and bash net redirection knows that this bash feature is much more flexible than netcat. Using netcat you can't access both input and output channels easily due to limitations on how shell pipelining works. You can easily redirect the input from a file, process or subshell, and you can easily redirect the output to another file, process or subshell. But it is insane to get both input and output of a process in the parent process using only common shell redirections. This severely limits what can be done with netcat, and is the very reason why bash implemented this feature. Bash net redirection allows that, very easily: exec 99/dev/tcp/server/port echo 99 Message 1 read -u 99 response1; echo $response1 echo 99 Message 2 read -u 99 response2; echo $response2 echo 99- The origin of this bug, http://bugs.debian.org/cgi- bin/bugreport.cgi?bug=65172 , has a really ridiculous discussion, IMO. The report was about an unrelated issue, they freaked out that bash was too bloated, then with what happens if the user has something under /dev/tcp (ignoring that it doesn't make any sense to have anything there, it was chosen for this reason, and that the user is not supposed to make such kinds of modifications to the system), and then it was decided that disabling the feature would solve the bug. If the user gets himself to a bash shell, he is probably smart enough to deal with bash features, and would probably make very good use of them. There were very strong reasons for this feature to be added to bash, and a very dumb arguments for it to be originally disabled in Debian. ** Bug watch added: Debian Bug tracker #65172 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=65172 -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
What kind of security holes might it open? You can just connect to a port.. same thing as with wget/curl/netcat... but directly from bash, which makes it pretty handy. -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
This feature might open security holes. Still it's really useful, +1 -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
I second this request! -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
To add a bit more info, Bash can optionally provide a virtual /dev/tcp and /dev/udp which can be used to request output from a udp/tcp port. This works on many other distributions and is a really great feature of Bash.. it's a shame that this isnt enabled. -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
** Changed in: bash (Ubuntu) Status: Confirmed = Triaged -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
This extension to bash would be a good thing make some network scripting as it's possible in other (non-debian) distributions. There are at least few scripts which use this extension. For example - google console search scripts ( http://rexio.org/~rush/google.sh ). -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 215034] Re: add /dev/tcp/... support
** Changed in: bash (Ubuntu) Importance: Undecided = Wishlist Status: New = Confirmed -- add /dev/tcp/... support https://bugs.launchpad.net/bugs/215034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
