bugtraq - openvas 2.x race condition

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Date: Sun, 4 Sep 2011 16:56:48 -0600
From: Bugs NotHugs <bugsnothugs@...il.com>
To: fd <full-disclosure@...ts.grok.org.uk>,
  bugtraq <bugtraq@...urityfocus.com>, vuldb@...urityfocus.com,
  vuln@...unia.com, submissions@...ketstormsecurity.org, xforce@....net,
  Vuln@...irt.com, timb@...nvas.org
Subject: openvas 2.x race condition

> openvas-server/openvas/oval_plugins.c
> [...]
> results_filename = "/tmp/results.xml";
> if (g_file_test (results_filename, G_FILE_TEST_EXISTS))
>    {
>      log_write ("Found existing results file in %s, deleting it to
> avoid conflicts.", results_filename);

it unlink /tmp/results.xml avoid symlink attack then spawn process
that write stuff to /tmp/results.xml

chinese apt can make symlink point to any system file during race and win race!

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