Date: Fri, 19 May 2017 10:31:34 -0700 From: Tavis Ormandy <taviso@...xchg8b.com> To: oss-security@...ts.openwall.com Subject: Re: terminal emulators' processing of escape sequences Robert Święcki <robert@...ecki.net> wrote: > Hi again, > > > 2017-05-17 15:56 GMT+02:00 Daniel Kahn Gillmor > > <dkg@...thhorseman.net>: > > > > Please consider the following example: > >>> > > > > $ tail -n1 /etc/hosts | xxd 00000000: 3132 372e 302e 302e 3309 1b47 > > > > 513b 205a 127.0.0.3..GQ; Z 00000010: 5a5a 0a > > > > ZZ. $ ping ZZZ PING ; (127.0.0.3) 56(84) bytes of data. > > > > ^[G0 64 bytes from ; (127.0.0.3): icmp_seq=1 ttl=64 time=0.039 ms > > > > ^[G0 64 bytes from ; (127.0.0.3): icmp_seq=2 ttl=64 time=0.032 ms > > > > ^[G0 ^C --- ; ping statistics --- 2 packets transmitted, 2 received, > > > > 0% packet loss, time 1014ms rtt min/avg/max/mdev = > > > > 0.032/0.035/0.039/0.006 ms ^[G0 $ 0 bash: 0: command not found > >> > > > what version of ping are you using? I was unable to replicate this > > > with either the debian iputils-ping package version 3:20161105-1, or > > > with debian inetutils-ping package version 2:1.9.4-2+b1. neither of > > > them seem to do a getnameinfo() at all if it is initially supplied > > > with an IP address. > > Browsing through the commands rxvt supports, I noticed you can set arbitrary X11 properties. That seems like the kind of thing some wm or de might trust for soemthing important (like gtk modules, etc). e.g. $ printf "\e]3;%s=TEST\a" TEST_PROPERTY $ xprop -id $WINDOWID TEST_PROPERTY TEST_PROPERTY(UTF8_STRING) = "TEST" The properties Gnome looks at are listed here, maybe you could cause some confusion this way. Do other environments (Xfce, KDE, etc) support more interesting properties? https://wiki.gnome.org/Attic/ApplicationSpecification Tavis.
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