yum issue

[madunix]

Am getting the following issue with my registered ssl certificate

[root at linux6 ~]# yum update
Loaded plugins: rhnplugin
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in ?
.....
File "/usr/lib64/python2.4/site-packages/M2Crypto/SSL/Connection.py",
line 149, in connect_ssl
    return m2.ssl_connect(self.ssl, self._timeout)
M2Crypto.SSL.SSLError: certificate verify failed

how to resolve this issue?

madunix