A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children.

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6
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2answers
822 views

Why chroot is considered insecure?

I've been playing around with CentOS box for couple of years now. So I'm pretty comfy with terminal. However, I read a lot of blog-post claiming that chroot is insecure and amount of those posts ...
0
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1answer
333 views

gcc sandboxing tool - AppArmor / CHROOT jail on Ubuntu 12.04

We have a Node application as the front end to a C++ sandboxing tool, which compiles code using gcc and outputs the result to the browser. e.g. exec("gcc -o /tmp/test /tmp/test.cpp", function ...
1
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0answers
50 views

Chrooted from LiveCD: Bad IO performace

my Ubuntu Server installation is broken, so I grabbed a Ubuntu Desktop CD, mounted my Ubuntu installtion on my hard disk and chrooted into it. But now my IO performance is really bad: # time dd ...
0
votes
1answer
2k views

SFTP, Chroot problems on Redhat

I'm having problems setting up sftp with a ChrootDirectory. I've done an equivalent setup on other distros, but for some reason I cannot get it to work on a Redhat AMI. The changes to my sshd_config ...
0
votes
1answer
227 views

How to allow access to binaries outside a root'ed directory

At Heroku I can use binaries like ImageMagick and others, but the filesystem seems chroot'ed and a clone of the web application directory (git repository). How do I allow access to binaries outside ...
1
vote
1answer
444 views

SSH - SFTP/SCP only + additional command running in background

there are many solutions described to get ur SSH-connection forced to only run SFTP by modifying the sshd_config by adding a new group match and give that new group a Forcecommand internal-sftp Well ...
1
vote
1answer
697 views

Jailkit not locking down SFTP, working for SSH

I installed jailkit on my CentOS 5.8 server, and configured it according to the online guides that I found. These are the commands that were executed as root: mkdir /var/jail jk_init -j /var/jail ...
10
votes
1answer
6k views

SFTP: file symlinks in a jailed (chrooted) directory

I'm trying to set up sftp so that a few trusted people can access/edit/create some files. I have jailed a user into their home directory (/home/name) but have run into a problem. I want for them to ...
5
votes
4answers
642 views

Is there a chroot build script somewhere?

I am about to develop a little script to gather information for a chroot-jail. In my case this looks (at the first glance) pretty simple: The application has a clean rpm-install and did install ...
2
votes
2answers
260 views

can not run java inside grsec chroot

java runs well inside common chroot. however in a grsec hardened chroot it complains it has no enough memory to build VM. any ideas of how to make it run cause i really need a hardened chroot. ...
0
votes
1answer
3k views

Chrooted user does not start in his home directory and does not load his bash_profiles

If the users logs in, he starts in / of the chroot (Which is /var/jail on the real machine). I would like him to start in his home-dir. Also, he seems not to load any of his profile-files (.bash.rc ...
0
votes
1answer
99 views

Chroot seems to be missing some progs/libs. What's necessary to get default commandline behaviour?

I've set up a chrooted environment using this tutorial. But the commandline isn't displayed correctly. Instead of the usual user@hostname:/home/user# it displays -bash-4.1$. What programs are needed ...
2
votes
2answers
898 views

Setting up a chroot sftp on debian server

I'm trying to allow a user "user" to access my server by either sftp or ssh. I want to jail them into a directory with chroot. I read the instructions here however it does not work. I did the ...
0
votes
1answer
370 views

Chroot to jail users into a directory [duplicate]

Possible Duplicate: How can I chroot ssh connections? I want to jail a particular user into a directory (so they can sftp and ssh) using chroot on Debian. How can I do this? The man page ...
0
votes
1answer
111 views

A specific user is unable to log in to vsftpd

I am setting up a new user let his name be ftpguy. He has access to only one directory /var/www/xxx. I have already chowned the directory so that he has write and read privileges. The user is also ...
1
vote
2answers
696 views

openssh sftp chroot

I chrooted a user to the directory /var/www/upload using ChrootDirectory /var/www/upload in my etc/ssh/sshd_config. The permissions of all the files in var/www/upload is 755 and owner is ...
2
votes
2answers
570 views

SFTP post upload hook

How would I run a script after a file has been successfully uploaded over (a chrooted) SFTP? I have this working on standard FTP connection using PureFTP ...
1
vote
0answers
840 views

PureFTPd : ChrootEveryone not working

I have a fresh install of Ubuntu 12.04 with pure-ftpd version 1.0.35-1. I don't use database for the only user I have (ftpuser1 - localuser), but I want to lock him into his home directory. ...
2
votes
2answers
5k views

User can't SFTP after chroot

Ubuntu 10.04.4 LTS I'm trying to chroot the user 'sam'. According to all the articles out there this should work, but apparently I'm still doing something wrong. The user: ...
1
vote
1answer
2k views

Is it possible to allow key based authentication for sshd_cofnig chroot sftp users?

I'm running an Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-30-generic x86_64) Server, with OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012. I'd like to configure chroot for sftp access using ...
8
votes
4answers
6k views

OpenSSH anything like 'internal-sftp' but for SCP?

I'm running Debian stable and I'm looking to establish the following environment for users in my 'sftponly' group: jailed can transfer with SFTP can transfer with SCP cannot login interactively with ...
0
votes
2answers
904 views

Chroot on startup

I have a script that runs on startup, but it wont launch a application in chroot. #!/bin/sh /usr/sbin/chroot /root/chrootdir/ /bin/sh -c "lighttpd -f /etc/lighttpd.conf -m /lib" echo "script ...
8
votes
2answers
11k views

SFTP fatal bad ownership or modes for chroot directory ubuntu 12.04

I just set up my SFTP server and it works fine when I use it from my first user account. I wanted to add a user which we will call 'magnarp'. At first I did like this in sshd_config: Subsystem sftp ...
3
votes
1answer
254 views

Link all LXC node APT caches to the host machine's APT cache

I have a number of LXC containers (ubuntu template) which all have their own separate APT caches. /var/lib/lxc/*/rootfs/var/cache/apt/archives/ I would like to have these linked to the host ...
0
votes
1answer
931 views

PHP-FPM Chroot jail corrupts timezone db?

I'm trying to setup a PHP-FPM Chroot jail on a new CentOS 6.3 box. I can get the chroot to work fine, in the sense that I can get php scripts to respond and echo things out. But, every time I use the ...
2
votes
1answer
4k views

ubuntu bind9 AppArmor read permission denied (chroot jail)

I am trying to run bind9 with chroot jail. I followed the steps mentioned at : http://www.howtoforge.com/debian_bind9_master_slave_system I am getting the following errors in my syslog: Jul 27 ...
3
votes
2answers
657 views

How to map authenticated Nginx users to their own directory?

I am writing a social networking site in C and serving it all up with Nginx. How can I make it so that authenticated users go to their own directory -ONLY- where a user-specific index.html resides. ...
1
vote
1answer
169 views

Chroot / sFtp / Ftps Problems

regular debian admin, i am faced to a complex situation and i appreciate your advices... I have a server with chroot environment that is working without problems up to now : Chroot user : store ...
1
vote
1answer
211 views

installing debian with debootstrap and lxc instead of debootstrap and chroot

So I need to 'install' (or rather prepare a root filesystem for) a Debian system and that was done with debootstrap and chroot before. However due to the not-very-existent isolation of chroots (with ...
0
votes
1answer
173 views

how to make sure that Apache processes is chrooted?

I am using Apache 2 on Debian 6. I tried to make Apache by using following resource: http://www.debian.org/doc/manuals/securing-debian-howto/ap-chroot-apache-env.en.html how can i be sure that Apache ...
3
votes
2answers
653 views

update grub2 without hardware access (e.g. in a chroot)?

I'm writing a script that takes a master KVM image, converts it to VDI, makes a few changes to it, and offers it up for download. I need to update the kernel boot parameters for some of the newly ...
3
votes
1answer
376 views

Resource consumption of FreeBSD's jails

Just for curiosity. An example machine: an dedicated amd64 server with the last stable version of FreeBSD and UFS for the partitions. How much resources consume FreeBSD for each empty jail? I mean, I ...
1
vote
2answers
594 views

PHP-FPM, chroot, Ubuntu Precise 12.04, and no access to DNS

There's a plenty of advices across the Internet on how to enable DNS in chroot. The problem is that there's no /lib/libnss* files in the Ubuntu Precise. I've tried to copy these files from /etc/: ...
0
votes
2answers
634 views

chroot'ing Apache to prevent shell scripts?

Recently I'm being told that a user has my system 'shelled.' While there hasn't been any unusual activity or errors in Apache error log, etc.. I'd rather be safe than sorry. So: If I run chroot ...
2
votes
2answers
7k views

chrooting user causes “connection closed” message when using sftp

First off I am a linux newbie so please don't assume much knowledge. I am using CentOS 5.8 (final) and using OpenSSH version 5.8p1. I have made a user playwithbits and I am attempting to chroot them ...
1
vote
1answer
175 views

How can I find out the path to a chrooted environment in which a particular daemon was started?

I have a setup with several directories where I can chroot and start the same daemon from. I'd like to be able to tell from which of my multiple directories I started the daemon. I'd like to find it ...
0
votes
2answers
684 views

nginx & php-fpm & clean urls

Hello i would like set up nginx like I want. I have read a lot of manuals (including official) but i can't make it work as I expect. I have next urls: /user/register, /user/login, /user/logout etc ...
0
votes
2answers
540 views

Ubuntu SFTP & Chrooting

I've been looking around for a few days now, playing around with configurations and following tutorials on this. I Have two groups: dev and sftp. Users within the dev group are also part of the ...
1
vote
1answer
1k views

HAProxy running in chroot jail is only logging started messages

I've configured my HAProxy server to run in a chroot jail logging messages to syslog socket. My problem is that the only messsages currently being logged are for when haproxy is starting up. May 26 ...
0
votes
1answer
365 views

vsftpd chroot_local_user error

When I set chroot_local_user to YES in the vsftpd configuration, I get this error in my ftp client: 220: (vsFTPd 2.3.5) Connected to 23.21.50.255. Cmd: AUTH TLS 234: Proceed with negotiation. Cmd: ...
0
votes
1answer
473 views

Do I need to chroot BIND 9 if I'm using AppArmor? [duplicate]

Possible Duplicate: bind9 in a chroot jail - necessary or not? I'm redoing my external dns servers and thinking about skipping chroot this time. And using apparmor or selinux as an ...
0
votes
1answer
384 views

Chroot SFTP Users

I have an Ubuntu Server, where several users log in to upload some files. Each user has a home directory, in which I 'd like to be chrooted. e.g. user1 connects with sftp to the server and is ...
1
vote
1answer
58 views

chrooting an application

I have an requirement that requires all applications running on a server in a DMZ to be chrooted. How does one chroot an application using Ubuntu? Are there any good online guides?
1
vote
1answer
341 views

is doing mount -t proc none /proc unsecure for a chroot environment?

What does mount -t proc none /proc do inside the chrooted environment? After doing that, when I run htop or ps aux inside the chrooted environment, I can see the actual root's processes. Does it ...
2
votes
2answers
821 views

Defining hard links in puppet

Is there a way to define hardlinks inside puppet manifest? It seems file type can only define symbolic links, but I need it to be hard links in order to make some of my chrooted applications to work. ...
2
votes
3answers
4k views

chrooting php-fpm with nginx

I'm setting up a new server with PHP 5.3.9 and nginx, so I compiled PHP with the php-fpm SAPI options. By itself it works great using the following server entry in nginx: server { listen 80; ...
3
votes
2answers
120 views

How to create a link outside of the jail, but accessable within the jail?

I have created a chroot jail, but now I want to be able to create a link within the jail which links outside of the jail. Is this possible?
1
vote
1answer
849 views

setlocale error with chroot

I have created a chroot jail and when I log in I get a bash warning bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8) I tried to google the error, but wasn't able to find a ...
1
vote
2answers
1k views

Implications that come with chrooting php-fpm

I am creating a production server that will run nginx with php-fpm. I want to have a good mix between securing the server, and still having good quick workflow. Now one thing that always secures the ...
5
votes
1answer
4k views

PHP-FPM's chroot and chdir directory

I am setting up php-fpm with chrooting enabled. Now I see that there are two options, and I want to know what the exact difference is. The setup has: chroot = /var/www/domains/domain.tld/ ; Chdir to ...