1. Ubuntu Security Notices
  2. USN-4930-1

USN-4930-1: Samba vulnerability

Publication date

29 April 2021

Overview

Samba would allow unintended access to files over the network.

Releases

Packages

  • samba - SMB/CIFS file, print, and login server for Unix

Details

Peter Eriksson discovered that Samba incorrectly handled certain negative
idmap cache entries. This issue could result in certain users gaining
unauthorized access to files, contrary to expected behaviour.

Peter Eriksson discovered that Samba incorrectly handled certain negative
idmap cache entries. This issue could result in certain users gaining
unauthorized access to files, contrary to expected behaviour.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
21.04 hirsute samba –  2:4.13.3+dfsg-1ubuntu2.1
20.10 groovy samba –  2:4.12.5+dfsg-3ubuntu4.3
20.04 focal samba –  2:4.11.6+dfsg-0ubuntu1.8
18.04 bionic samba –  2:4.7.6+dfsg~ubuntu-0ubuntu2.23
16.04 xenial samba –  2:4.3.11+dfsg-0ubuntu0.16.04.34

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References

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