Debian Security Advisory

DLA-666-1 guile-2.0 -- LTS security update

Date Reported:
18 Oct 2016
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 840555, Bug 840556.
In Mitre's CVE dictionary: CVE-2016-8605, CVE-2016-8606.
More information:

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: