| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200711-32"> |
| <title>Feynmf: Insecure temporary file creation</title> |
| <synopsis> |
| A vulnerability has been discovered in Feynmf allowing local users to |
| overwrite arbitrary files via a symlink attack. |
| </synopsis> |
| <product type="ebuild">feynmf</product> |
| <announced>November 20, 2007</announced> |
| <revised>November 20, 2007: 01</revised> |
| <bug>198231</bug> |
| <access>local</access> |
| <affected> |
| <package name="dev-tex/feynmf" auto="yes" arch="*"> |
| <unaffected range="ge">1.08-r2</unaffected> |
| <vulnerable range="lt">1.08-r2</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| Feynmf is a combined LaTeX and Metafont package for easy drawing of |
| professional quality Feynman (and maybe other) diagrams. |
| </p> |
| </background> |
| <description> |
| <p> |
| Kevin B. McCarty discovered that the feynmf.pl script creates a |
| temporary "properly list" file at the location "$TMPDIR/feynmf$PID.pl", |
| where $PID is the process ID. |
| </p> |
| </description> |
| <impact type="normal"> |
| <p> |
| A local attacker could create symbolic links in the directory where the |
| temporary files are written, pointing to a valid file somewhere on the |
| filesystem that is writable by the user running Feynmf. When Feynmf |
| writes the temporary file, the target valid file would then be |
| overwritten with the contents of the Feynmf temporary file. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There is no known workaround at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All Feynmf users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=dev-tex/feynmf-1.08-r2"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5940">CVE-2007-5940</uri> |
| </references> |
| <metadata tag="requester" timestamp="Mon, 19 Nov 2007 21:43:28 +0000"> |
| p-y |
| </metadata> |
| <metadata tag="bugReady" timestamp="Mon, 19 Nov 2007 21:44:51 +0000"> |
| p-y |
| </metadata> |
| <metadata tag="submitter" timestamp="Tue, 20 Nov 2007 00:07:40 +0000"> |
| rbu |
| </metadata> |
| </glsa> |