USN-75-1: cpio vulnerability

4 February 2005

cpio vulnerability

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Releases

Details

Recently it was discovered that cpio created world-writeable files
when used in -o/--create mode with giving an output file (with -O).
This allowed any user to modify the created cpio archives. Now cpio
respects the current umask setting of the user.

Note: This vulnerability has already been fixed in a very old version
of cpio, but the fix was never ported to the current version.
Therefore the CAN number was assigned to the year 1999.

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Update instructions

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

Ubuntu 4.10
  • cpio -

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

References

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Further reading