From mike.gabriel@das-netzwerkteam.de Tue Oct 29 13:23:17 2013 Received: (at 327) by bugs.x2go.org; 29 Oct 2013 12:23:17 +0000 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on ymir.das-netzwerkteam.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,URIBL_BLOCKED autolearn=ham version=3.3.2 Received: from freya.das-netzwerkteam.de (freya.das-netzwerkteam.de [88.198.48.199]) by ymir (Postfix) with ESMTPS id 178C65DA6C; Tue, 29 Oct 2013 13:23:17 +0100 (CET) Received: from grimnir.das-netzwerkteam.de (grimnir.das-netzwerkteam.de [78.46.204.98]) by freya.das-netzwerkteam.de (Postfix) with ESMTPS id 80010BBE; Tue, 29 Oct 2013 13:23:16 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by grimnir.das-netzwerkteam.de (Postfix) with ESMTP id 72CDA3BB6D; Tue, 29 Oct 2013 13:23:16 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at grimnir.das-netzwerkteam.de Received: from grimnir.das-netzwerkteam.de ([127.0.0.1]) by localhost (grimnir.das-netzwerkteam.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ju2DA1wMpiu4; Tue, 29 Oct 2013 13:23:16 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by grimnir.das-netzwerkteam.de (Postfix) with ESMTP id 47CB63BB68; Tue, 29 Oct 2013 13:23:16 +0100 (CET) Received: from grimnir.das-netzwerkteam.de (localhost [127.0.0.1]) by grimnir.das-netzwerkteam.de (Postfix) with ESMTPSA id 1982E3BB58; Tue, 29 Oct 2013 13:23:16 +0100 (CET) Received: from m-047.informatik.uni-kiel.de (m-047.informatik.uni-kiel.de [134.245.254.47]) by mail.das-netzwerkteam.de (Horde Framework) with HTTP; Tue, 29 Oct 2013 12:23:16 +0000 Date: Tue, 29 Oct 2013 12:23:16 +0000 Message-ID: <20131029122316.Horde.0UwNNkH8HU_JhQ-Y0lXJYw2@mail.das-netzwerkteam.de> From: Mike Gabriel To: Dan Halbert Cc: 327@bugs.x2go.org, control@bugs.x2go.org Subject: Re: [X2Go-Dev] Bug#327: x2go client crashes if .bashrc prints anything References: <1382199763.63727452@beta.apps.rackspace.com> <20131029083628.Horde.8Mmv6w__TzqxxZW5QIjqjw9@mail.das-netzwerkteam.de> <526FA219.9030701@halwitz.org> In-Reply-To: <526FA219.9030701@halwitz.org> User-Agent: Internet Messaging Program (IMP) H5 (6.1.4) Accept-Language: en,de Organization: DAS-NETZWERKTEAM X-Originating-IP: 134.245.254.47 X-Remote-Browser: Mozilla/5.0 (X11; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0 Iceweasel/23.0 Content-Type: multipart/signed; boundary="=_DvYFWd4WI7oZv9DFGwFrZQ3"; protocol="application/pgp-signature"; micalg=pgp-sha1 MIME-Version: 1.0 This message is in MIME format and has been PGP signed. --=_DvYFWd4WI7oZv9DFGwFrZQ3 Content-Type: multipart/mixed; boundary="=_lUqGtJ7UNyDjIStEyHJsBw5" This message is in MIME format. --=_lUqGtJ7UNyDjIStEyHJsBw5 Content-Type: text/plain; charset=utf-8; format=flowed; DelSp=Yes Content-Disposition: inline clone #327 -1 tag #327 wontfix retitle -1 users can inject data into X2Go Client using .bashrc severity -1 grave Hi Dan, On Di 29 Okt 2013 12:55:05 CET, Dan Halbert wrote: > On 10/29/2013 4:36 AM, Mike Gabriel wrote: >> If I put an >>> echo "testing" # exact text doesn't matter >> >> I presume, this on the server. > Right, this is on the server. With the Windows client there is no > .bashrc anyway. I confirmed with my colleague that he saw this on > both the Windows and Ubuntu Precise clients. > > Which windowing system chosen on the server does not seem to matter > either. I saw it with UNITY and with just "Terminal". > >> I could confirm this issue on Debian wheezy or Ubuntu precise as >> X2Go Server. On Ubuntu lucid, the problem does not occur. > That's interesting. The reason for putting in the echo's was to > debug a completely unrelated problem about which shell init got run > when we were running some batch jobs. I had instrumented the init > files before without difficulty. Thanks for looking at this. I have looked at this in depth this morning. Indeed an echoing .bashrc file breaks X2Go. But it also breaks everything else around SSH, esp. scp [1, 2]. The first link [1] also provides a solution that I want to quote here: """ (file: ~/.bashrc) [... normal .bashrc stuff ...] if [[ $- =~ "i" ]]; then echo "SPEAK OUT LOUD!!!" fi """ The i-flag in $- checks if the shell is interactive or not. With X2Go, this flag will not get set. Greets, Mike [1] http://stackoverflow.com/questions/12440287/scp-doesnt-work-when-echo-in-bashrc [2] https://bugzilla.redhat.com/show_bug.cgi?id=20527 -- DAS-NETZWERKTEAM mike gabriel, herweg 7, 24357 fleckeby fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb --=_lUqGtJ7UNyDjIStEyHJsBw5 Content-Type: application/pgp-keys Content-Description: =?utf-8?b?w5ZmZmVudGxpY2hlciA=?= =?utf-8?b?UEdQLVNjaGzDvHNzZWw=?= -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.14 (GNU/Linux) mQINBFAI/RwBEAC882z9DZ0OqvdoswfZD6sWlHH43iTc2QUibyHEhz/Jov8UQLPK qUncNd9QMcQ3zp2NnU9tS4j5IY/QPcBMR96ZNdl9PWpV/Ubs6yZ9PK2/DBt3Noos FZUN2KrHbnbED5zf9sEHyRuBTnDtVRtskQlaFreX5NSZ1ndqJrC1Uqm64Mf+0mC8 7D1QRlNkH7OQmMK+u6EN8a1IZae7mDzzStgzvbvm1BZ6XDJ6ThNckvGEhgSbPF16 9zfW6a0mdlOjkmW50VIQg3wjtVHxlIYqFnH4KGp2kYslJR3SIB7ntbNW1wVQm8d2 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