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+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="200504-06">
+  <title>sharutils: Insecure temporary file creation</title>
+  <synopsis>
+    The unshar utility is vulnerable to symlink attacks, potentially allowing a
+    local user to overwrite arbitrary files.
+  </synopsis>
+  <product type="ebuild">sharutils</product>
+  <announced>2005-04-06</announced>
+  <revised count="01">2005-04-06</revised>
+  <bug>87939</bug>
+  <access>local</access>
+  <affected>
+    <package name="app-arch/sharutils" auto="yes" arch="*">
+      <unaffected range="ge">4.2.1-r11</unaffected>
+      <vulnerable range="lt">4.2.1-r11</vulnerable>
+    </package>
+  </affected>
+  <background>
+    <p>
+    sharutils is a collection of tools to deal with shar archives.
+    </p>
+  </background>
+  <description>
+    <p>
+    Joey Hess has discovered that the program unshar, which is a part
+    of sharutils, creates temporary files in a world-writable directory
+    with predictable names.
+    </p>
+  </description>
+  <impact type="normal">
+    <p>
+    A local attacker could create symbolic links in the temporary
+    files directory, pointing to a valid file somewhere on the filesystem.
+    When unshar is executed, this would result in the file being
+    overwritten with the rights of the user running the utility, which
+    could be the root user.
+    </p>
+  </impact>
+  <workaround>
+    <p>
+    There is no known workaround at this time.
+    </p>
+  </workaround>
+  <resolution>
+    <p>
+    All sharutils users should upgrade to the latest version:
+    </p>
+    <code>
+    # emerge --sync
+    # emerge --ask --oneshot --verbose "&gt;=app-arch/sharutils-4.2.1-r11"</code>
+  </resolution>
+  <references>
+    <uri link="https://www.ubuntulinux.org/support/documentation/usn/usn-104-1">Ubuntu Advisory</uri>
+  </references>
+  <metadata tag="requester" timestamp="2005-04-05T07:42:03Z">
+    koon
+  </metadata>
+  <metadata tag="submitter" timestamp="2005-04-05T13:07:06Z">
+    lewk
+  </metadata>
+  <metadata tag="bugReady" timestamp="2005-04-06T20:15:09Z">
+    lewk
+  </metadata>
+</glsa>