f2c: Insecure temporary file creation
Gentoo Linux Security Advisory
||GLSA 200501-43 / f2c
||January 30, 2005
||January 30, 2005: 01
All supported architectures
f2c is vulnerable to symlink attacks, potentially allowing a local user to
overwrite arbitrary files.
f2c is a Fortran to C translator. Portage uses this package in
some ebuilds to build Fortran sources.
Javier Fernandez-Sanguino Pena from the Debian Security Audit Team
discovered that f2c creates temporary files in world-writeable
directories with predictable names.
A local attacker could create symbolic links in the temporary
files directory, pointing to a valid file somewhere on the filesystem.
When f2c is executed, this would result in the file being overwritten
with the rights of the user running the software, which could be the
There is no known workaround at this time.
All f2c users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/f2c-20030320-r1"