[SECURITY] [DLA 666-1] guile-2.0 security update

Package : guile-2.0
Version : 2.0.5+1-3+deb7u1
CVE ID : CVE-2016-8605 CVE-2016-8606
Debian Bug : 840555 840556

Several vulnerabilities were discovered in GNU Guile, an
implementation of the Scheme programming language. The Common
Vulnerabilities and Exposures project identifies the following issues.

CVE-2016-8605:
The mkdir procedure of GNU Guile temporarily changed the process'
umask to zero. During that time window, in a multithreaded
application, other threads could end up creating files with
insecure permissions.

CVE-2016-8606:
GNU Guile provides a "REPL server" which is a command prompt that
developers can connect to for live coding and debugging purposes.
The REPL server is started by the '–listen' command-line option
or equivalent API.

It was reported that the REPL server is vulnerable to the HTTP
inter-protocol attack.

This constitutes a remote code execution vulnerability for
developers running a REPL server that listens on a loopback device
or private network. Applications that do not run a REPL server, as
is usually the case, are unaffected.

For Debian 7 "Wheezy", these problems have been fixed in version
2.0.5+1-3+deb7u1.

We recommend that you upgrade your guile-2.0 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS