storebackup vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

* Ubuntu 20.04 LTS
* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

StoreBackup could be made to stop executing or generate a race
condition if it received a lock file in the default location.

Software Description

* storebackup - fancy compressing managing checksumming
deduplicating hard-linkin

Details

It was discovered that StoreBackup did not properly manage lock
files. A local attacker could use this issue to cause a denial of
service or escalate privileges and run arbitrary code.
(CVE-2020-7040)

Update instructions

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

Ubuntu 20.04 LTS
storebackup - 3.2.1-1+deb8u1build0.20.04.1

Ubuntu 18.04 LTS
storebackup - 3.2.1-1+deb8u1build0.18.04.1

Ubuntu 16.04 LTS
storebackup - 3.2.1-1+deb8u1build0.16.04.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2020-7040

--- Mystic BBS v1.12 A46 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)