similar to: secure user restriction

PIZZACODE SECURITY ALERT program: rssh risk: low[*] problem: string format vulnerability in log.c details: rssh is a restricted shell for use with OpenSSH, allowing only scp and/or sftp. For example, if you have a server which you only want to allow users to copy files off of via scp, without providing shell access, you can use rssh to do that. Additioanlly, running rsync, rdist, and cvs are

Affected Software: rssh - all versions prior to 2.3.0 Vulnerability: local user privilege escalation Severity: *CRITICAL* Impact: local users can gain root access Solution: Please upgrade to v2.3.1 Summary ------- rssh is a restricted shell which allows a system administrator to limit users' access to a system via SSH to scp, sftp, rsync, rdist, and cvs. It also allows the system

Thanks for these 3rd party hacks! I don't trust them. There must be such feature in openssh out of box. So the most secure/easyer method of giving sftp access to porn collection is: Damiens sftp-server chroot patch, which I hope to see in openssh one day :) http://marc.info/?l=openssh-unix-dev&m=116043792120525&w=2 # useradd -d /data/p0rn -m share /etc/ssh/sshd_config: Match user

Hi, As per the subject line - if I look up setting up chroot jails for SFTP over SSH2 I'm led to various Web sites and patches and also to a CentOS wiki page dated 2005, but what's the 'best' or 'correct' way to set this up for Centos 4.5 and 5? Thanks

I worked on a proposal like this a few years back (including proof of concept code).? I taught sftp to have an scp personality (closer to scp2 than scp), and it was rejected by the higher ups.? It may have been the dual-personality issue, but I know the scp2 concept was also rejected at the time as it was stated there should be one transfer tool. But the only way to drag scp into this century

Hi, On CentOS 7 I?m trying to set up a chrooted SFTP server on which specific users can only read and write on specific folder. And I?d like to disable some commands, so the users can only do ?cd?, ?ls?, ?get? and ?put? (and disabling ?chgrp?, ?chmod?, ?chown?, ?df? etc ?). Is there a way to achieve it, natively or with using a third-party software ? Alexandre MALDEME Analyste d'exploitation

> $ rsync -e 'ssh -v' lingnu.com: > OpenSSH_5.1p1 Debian-2, OpenSSL 0.9.8g 19 Oct 2007 > debug1: Reading configuration data /etc/ssh/ssh_config > debug1: Applying options for * > debug1: Connecting to lingnu.com [199.203.56.105] port 22. > debug1: Connection established. ... > debug1: Sending command: rsync --server --sender -de.L . As we can see, rsync runs ssh, and

Hi Damien, Thank you. I read the rationale. Just to summarize, a user writeable chroot target is considered dangerous if: 1) the user has another way of gaining non-chrooted access to the system 2) is able to create hardlinks to setuid-binaries outside of the chroot tree 3) there are bugs somewhere that allow privilige escalation or remote execution of other programs While all these

Hello, I'm new to the list, but hopefully I've done enough digging around that I don't get yelled at too terribly ;) We're looking to implement a chrooted environment for allowing users to scp files from servers. That's basically the only functionality that we need in this case. We're looking to chroot the user and/or remove any chance that the account can login via

I installed Rails and Rubygems on a web server for a customer who wants to install a Ruby on Rails application that he developped. He needs SSH access to interact with Ruby, so I''ll have to grant him access, but I want him to only play around in his /home directory, as this server also hosts other customers. How could I do that? Thanks, -- Posted via http://www.ruby-forum.com/.

I am supporting a site that allows members to upload release files. I have inherited this site which was previously existing. The goal is to allow members to file transfer to and from their project area for release distribution but not to allow general shell access and not to allow access to other parts of the system. Currently rsync and old scp has been restricted using a restricted shell

Hi, my goal: sftp/scp only access, without the need for linux users. I want to provide 10 sftp/scp directories to 10 people. Let's call this "virtual account" I don't want to create linux users for each of them. I would like to create one linux user (backup_user). In his home-directory will be 10 directories. For each "virtual account" one directory. Every

Hi! I do not know if it's the ideal place, but I'm sending some suggestion. Always use openssh and its enormous features. - I needed to create an environment with only sftp access and thus used: - Match User suporte ForceCommand / usr / lib / openssh / sftp-server OK! It worked perfectly! But only sftp. - Create an environment with only blocking the ssh, but scp and

Hello, I am trying to setup a file server using the SFTP protocol with OpenSSH. I am in trouble because sshd refuses to chroot to a directory that is writable by users other than the owner. I guess that this is to prevent someone else from creating a .ssh/authorized_keys file and impersonate the user. But we have configured an alternative AuthorizedKeysFile. I also understand that a chroot user

Hi, Is anyone chrooting users that connect through SSH? I looked for it on Google and I basically saw several methods: - OpenSSH 5 supports ChrootDirectory (FC9 apparently has RPMs that probably could be rebuilt under CentOS 5) - There seem to be several patches for OpenSSH 4.x to do the chroot, the most popular seems to be http://chrootssh.sf.net/ - There appears to be a pam_chroot - There are

Note: I am digest subscriber so if you could copy me directly on any reply to the list I would appreciate it very much. I sent this to the OpenSSH list (secureshell at securityfocus.com) yesterday and received no response so I am asking here in hopes that someone else has run across this problem on CentOS. We have encountered a situation that requires sftp access to one of our server by an

http://bugzilla.mindrot.org/show_bug.cgi?id=1257 Summary: Wrong times in log files.... Product: Portable OpenSSH Version: 4.4p1 Platform: ix86 OS/Version: Linux Status: NEW Severity: normal Priority: P2 Component: sftp-server AssignedTo: bitbucket at mindrot.org ReportedBy: jean-yves at

I just released rssh version 2.2.3 to fix the problem detailed below. I haven't had time to update my website yet, and my Internet acess is quite limited these days (hence the terse announcement), so I probably won't get to that for a while. However, rssh 2.2.3 is available from the sourceforge.net site: http://sourceforge.net/projects/rssh All users of rssh should update to the

rssh is a small shell whose purpose is to restrict users to using scp or sftp, and also provides the facilities to place users in a chroot jail. It can also be used to lock users out of a system completely. William F. McCaw identified a minor security flaw in rssh when used with chroot jails. There is a bug in rssh 2.0 - 2.1.x which allows a user to gather information outside of a chrooted jail

Hi, We have a CLI that certain users get dropped into when they log in. One of the things they can go is generate certificates (actually .p12 key/certificate bundles) that they will then scp out of the box from another host. Problem is that if their default shell isn't sh, ash, dash, bash, zsh, etc. then things break. Is there a workaround to allow scp/sftp to continue to work even for