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Ubuntu 20.04 LTS: USN-4508-1 Critical: StoreBackup Race Condition

ubuntu
Calendar Grey September 16, 2020
Dist Ubuntu Esm H88
To enhance the security of your Ubuntu system, please ensure you update it to mitigate the critical vulnerability in StoreBackup as described in USN-4508-1, applicable to several LTS versions.
StoreBackup could be made to stop executing or generate a race condition if it received a lock file in the default location.

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)

Topics%20covered

Topics Covered

security advisory denial of service local privilege escalation Ubuntu storebackup

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

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

References

https://ubuntu.com/security/notices/USN-4508-1

CVE-2020-7040

Severity
critical
Lowest
Low
Medium
High
Critical

September 16, 2020

Topics%20covered

Topics Covered

security advisory denial of service local privilege escalation Ubuntu storebackup

Package Information

https://launchpad.net/ubuntu/+source/storebackup/3.2.1-1+deb8u1build0.20.04.1
https://launchpad.net/ubuntu/+source/storebackup/3.2.1-1+deb8u1build0.18.04.1
https://launchpad.net/ubuntu/+source/storebackup/3.2.1-1+deb8u1build0.16.04.1

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