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Date: Wed, 13 Oct 2010 09:57:36 -0400
From: Dan Rosenberg <dan.j.rosenberg@...il.com>
To: oss-security@...ts.openwall.com
Subject: CVE request: ettercap GTK
The GTK version of ettercap uses a global settings file at
/tmp/.ettercap_gtk and does not verify ownership of this file before
reading it. When parsing this file for settings in gtkui_conf_read()
(src/interfaces/gtk/ec_gtk_conf.c), an unchecked sscanf() call can
result in a stack-based buffer overflow. Local users can place
maliciously crafted settings files at this location to exploit other
users who run ettercap. On most distributions, stack-smashing
protection will mitigate the impact. I'm unclear as to whether there
are settings that could be forced upon other users that make ettercap
misbehave in a dangerous way.
There are two issues here (insecure temporary file usage and
stack-based buffer overflow), but they're probably only
security-relevant when exploited in conjunction. Not sure if it
should get one CVE or two.
Reference:
https://bugs.launchpad.net/ubuntu/+source/ettercap/+bug/656347
-Dan
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