Thanks to several high-profile vulnerabilities and an overall increase in the number of flaws, open-source software has taken over Microsoft Corp.'s position at the bottom of the security heap.

A recent research note from two analysts at the Aberdeen Group calls open-source software and Linux distributions the "2002 poster children for security problems." Of the 29 advisories issued through October by the CERT Coordination Center at Carnegie Mellon University in Pittsburgh, 16 of them addressed vulnerabilities in open-source or Linux products.

Seven of the advisories were related to Microsoft products.

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