similar to: OpenSSH Security Advisory: xauth command injection

OpenSSH Security Advisory: x11fwd.adv This document may be found at: http://www.openssh.com/txt/x11fwd.adv 1. Affected configurations All versions of OpenSSH prior to 7.2p2 with X11Forwarding enabled. 2. Vulnerability Missing sanitisation of untrusted input allows an authenticated user who is able to request X11 forwarding to inject commands to xauth(1). Injection of xauth

Portable OpenSSH 7.2p2 has just been released. It will be available from the mirrors listed at http://www.openssh.com/ shortly. OpenSSH is a 100% complete SSH protocol 2.0 implementation and includes sftp client and server support. OpenSSH also includes transitional support for the legacy SSH 1.3 and 1.5 protocols that may be enabled at compile-time. Once again, we would like to thank the

I do not often use X11 - but when I do I prefer to enable X11forwarding, and when finished - turn it off. This is preferable, imho, to having "clear" X11 processing when local - and otherwise impossible when working remote. Working with openssh-7.5p2 I cannot figure out what (extra) I need to do with sshd_config to get it working. I know that there is a security-fix starting with

On 13/10/2017 08:03, Damien Miller wrote: > On Thu, 12 Oct 2017, Michael Felt wrote: > >> On 08/10/2017 23:32, Michael Felt wrote: >>> On 04/10/2017 11:07, Michael Felt wrote: >>>> I do not often use X11 - but when I do I prefer to enable >>>> X11forwarding, and when finished - turn it off. This is preferable, >>>> imho, to having

Nico Kadel-Garcia <nkadel at gmail.com> writes: > Dag-Erling Sm?rgrav <des at des.no> writes: > > Some OS distributions (FreeBSD, RHEL / CentOS, probably Fedora) have > > X11Forwarding enabled by default. > I'm not sure I see your point. With X11Forwarding off by default, one would assume that it is only enabled on a case-by-case basis for users or groups who

Nico Kadel-Garcia <nkadel at gmail.com> writes: > I'm just trying to figure out under what normal circumstances a > connection with X11 forwarding enabled wouldn't be owned by a user who > already has normal system privileges for ssh, sftp, and scp access. Some OS distributions (FreeBSD, RHEL / CentOS, probably Fedora) have X11Forwarding enabled by default. DES --

On 13/10/2017 15:29, Michael Felt wrote: > This verifies it is xauth related: > > debug3: sending debug message: No xauth program; cannot forward with > spoofing. > > so, added an extra debug - and this is what I see: > > debug1: session_input_channel_req: session 0 req x11-req > debug3: setup_x11fwd: xauth_location == /usr/X11R6/bin/xauth > debug3: sending debug

I still don't understand the point of authenticating myself to my own local X server when using X11 forwarding, I tried: ssh -R /tmp/.X11-unix/X0:/tmp/.X11-unix/X0 user at server # and then DISPLAY=:0 xterm and everything is working fine without the mess with xauth, so why it is required to use use xauth when doing X11 forwarding with ssh?

Alan Coopersmith (2): include POSIX-standard limits.h for PATH_MAX instead of sys/syslimits.h autogen.sh: Honor NOCONFIGURE=1 Dr. Tilmann Bubeck (2): Clarified RELEASING in README Fix for xauth failing on ENOSPC (= disk full) Emil Velikov (1): autogen.sh: use quoted string variables Jeremy Huddleston Sequoia (1): Update DISPLAY parsing to work with new

This release fixes a race condition where an existing authority file would be unlinked (possibly causing other clients to fail to connect), and fixes sorting and merging of authority file entries. Adam Jackson (2): process: Close a window where no authority file would exist xauth 1.1 Alan Coopersmith (3): Change fall through comment in process.c to match gcc's requirements

The current configuration only works if xauth can be found at /usr/X11R6/bin/xauth, which creates some problems when running sshd on an openwin system. Contained below are patches to find the path of xauth in configure, and set the path in config.h. (also contained is a patch for configure for those without autoconf) Also-- added #include "bsd-daemon" to includes.h, which quiets a

Adam Jackson (1): xauth 1.0.3 Daniel Drake (1): Bug #10971: xauth COPYING file Jeremy Huddleston (2): Added support for launchd socket get_address_info: don't allow duplicate entries to be returned in the list git tag: xauth-1.0.3 http://xorg.freedesktop.org/archive/individual/app/xauth-1.0.3.tar.bz2 MD5: e91e10ace1df0d5f2cbc74ead256407a xauth-1.0.3.tar.bz2 SHA1:

Manpage typo fix & minor cleanups, autoconf/make updates. This release is targeted for 7.2. http://xorg.freedesktop.org/releases/individual/app/xauth-1.0.2.tar.bz2 http://xorg.freedesktop.org/releases/individual/app/xauth-1.0.2.tar.gz git tag: xauth-1.0.2 md5 (xauth-1.0.2.tar.bz2) = 31b956edaeb453ddaa640420e97b25b2 md5 (xauth-1.0.2.tar.gz) = 5165d33891addd8e511e35876953b261 sha1

Dear All, I'm using Centos5 to run a firewall, and as part of the intrusion detection apparatus, I use tripwire (tripwire-2.4.1.1-1.fc6.x86_64.rpm - as made for fedora core 6, and then tweaked with my own twpol.txt). My problem, is that when I su to root, a .xauth file is created with a random tail name - i.e. /root/.xauthyN4aHS or /root/.xauth1sGdFh and this causes tripwire to

Hello, I have a strange (for me) problem with these two machines : - Client, a CentOS-5.7 workstation ; - Server, a CentOS-6.2 headless, up-to-date server. From Client, I want to use xauth on Server with the help of rsh (yes, I know, ssh and all this sort of things... another time.) When SELinux is in permissive mode on Server, all these commands perform as expected : rsh Server

On 08/10/2017 23:32, Michael Felt wrote: > On 04/10/2017 11:07, Michael Felt wrote: >> I do not often use X11 - but when I do I prefer to enable >> X11forwarding, and when finished - turn it off. This is preferable, >> imho, to having "clear" X11 processing when local - and otherwise >> impossible when working remote. >> >> Working with

http://bugzilla.mindrot.org/show_bug.cgi?id=1082 Summary: xauth list invocation has bogus "." argument Product: Portable OpenSSH Version: 4.2p1 Platform: ix86 OS/Version: NetBSD Status: NEW Severity: normal Priority: P2 Component: ssh AssignedTo: bitbucket at mindrot.org

Hi all. I'm trying to use ssh to connect from a PC (using TerraTerm with the ssh add-in) to a Solaris 8 or Solaris 9 box (both running OpenSSH 3.7.1p2) to establish a session for X-forwarding. Everything works great, until I use "su" to change to another account (such as root). The su'd user doesn't seem to be able to authenticate properly to use the X-tunnel. I did a

http://bugzilla.mindrot.org/show_bug.cgi?id=733 Summary: ssh doing xauth stuff even when it can't access local .Xauthority file Product: Portable OpenSSH Version: -current Platform: UltraSparc OS/Version: Solaris Status: NEW Severity: normal Priority: P2 Component: ssh

I have 2 labs I have to maintain. The first is a Windows-based lab, and the second is a Linux-based lab. I'm trying to combine the user accounts to make everything easier... here's what I have so far: The Linux test machine has Samba 3 installed on Fedora Core 1, with winbind and pam_mount. Pam_mount automatically maps the home directory, and everything works perfectly when I log in