Certain Sun products (including some bundled third party products) may be vulnerable to an RSA(1) Signature Verification vulnerability that allows unauthorized forged certificates to be validated. This may result in a number of different types of remote exploits.
The specific impact will vary from product to product; see the "Contributing Factors" section for further details.
More details of the issue are available from CERT Vulnerability VU#845620 at http://www.kb.cert.org/vuls/id/845620 which is also mentioned at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339
