This bulletin was written by Vigil@nce : http://vigilance.fr/

SYNTHESIS OF THE VULNERABILITY

When the administrator installs D-Bus, a local attacker can create
a symbolic link, in order to corrupt the file.

Severity : 1/4

Creation date : 24/06/2011

IMPACTED PRODUCTS

– Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The D-Bus service is used by applications to communicate via
messages sent on a bus.

The administrator runs the "./configure" script, in order to
install D-Bus. The cc_supports_flag() function of this script
detects flags supported by the gcc compiler. In order to do so, it
creates a temporary C file and compiles it. However, this
temporary file has a predictable name (/tmp/foo$PID) and it is
located in a publicly writable directory.

When the administrator installs D-Bus, a local attacker can
therefore create a symbolic link, in order to corrupt the file.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/D-Bus-file-corruption-during-the-installation-10773