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USN-405-1: fetchmail vulnerability

11 January 2007

fetchmail vulnerability



It was discovered that fetchmail did not correctly require TLS
negotiation in certain situations. This would result in a user's
unencrypted password being sent across the network.

If fetchmail has been configured to use the "sslproto tls1",
"sslcertck", or "sslfingerprint" options with a server that does not
correctly support TLS negotiation, this update may cause fetchmail to
(correctly) abort authentication.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 6.10
  • fetchmail - 6.3.4-1ubuntu4.1
Ubuntu 6.06
  • fetchmail - 6.3.2-2ubuntu2.1
Ubuntu 5.10
  • fetchmail - 6.2.5-13ubuntu3.3

In general, a standard system upgrade is sufficient to effect the
necessary changes.