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USN-209-1: SSH server vulnerability

18 October 2005

SSH server vulnerability

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Details

An information disclosure vulnerability has been found in the SSH
server. When the GSSAPIAuthentication option was enabled, the SSH
server could send GSSAPI credentials even to users who attempted to
log in with a method other than GSSAPI. This could inadvertently
expose these credentials to an untrusted user.

Please note that this does not affect the default configuration of the
SSH server.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 5.04
  • openssh-server -
Ubuntu 4.10
  • openssh-server -

In general, a standard system update will make all the necessary changes.

References