USN-142-1: sudo vulnerability

21 June 2005

sudo vulnerability

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Details

Charles Morris discovered a race condition in sudo which could lead to
privilege escalation. If /etc/sudoers allowed a user the execution of
selected programs, and this was followed by another line containing
the pseudo-command “ALL”, that user could execute arbitrary commands
with sudo by creating symbolic links at a certain time.

Please note that this does not affect a standard Ubuntu installation.

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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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Update instructions

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

Ubuntu 5.04
  • sudo -
Ubuntu 4.10
  • sudo -

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

References

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Further reading