USN-4707-1: TCMU vulnerability

28 January 2021

tcmu could be made to crash if it received specially crafted input.

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Releases

Packages

  • tcmu - TCM-Userspace backend

Details

It was discovered that TCMU lacked a check for transport-layer restrictions,
allowing remote attackers to read or write files via directory traversal in
an XCOPY request.

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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 20.10
Ubuntu 20.04

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

References

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Further reading