Race condition in the xdg.BaseDirectory.get_runtime_dir function in
python-xdg 0.25 allows local users to overwrite arbitrary files by
pre-creating /tmp/pyxdg-runtime-dir-fallback-victim to point to a
victim-owned location, then replacing it with a symlink to an
attacker-controlled location once the get_runtime_dir function is
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MLIST:[oss-security] 20140121 Fwd: [Python-modules-team] Bug#736247: python-xdg: get_runtime_dir(strict=False): insecure use of /tmp
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