1. Ubuntu Security Notices
  2. USN-4217-1

USN-4217-1: Samba vulnerabilities

Publication date

10 December 2019

Overview

Several security issues were fixed in Samba.

Releases

Packages

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

Details

Andreas Oster discovered that the Samba DNS management server incorrectly
handled certain records. An authenticated attacker could possibly use this
issue to crash Samba, resulting in a denial of service. (CVE-2019-14861)

Isaac Boukris discovered that Samba did not enforce the Kerberos
DelegationNotAllowed feature restriction, contrary to expectations.
(CVE-2019-14870)

Andreas Oster discovered that the Samba DNS management server incorrectly
handled certain records. An authenticated attacker could possibly use this
issue to crash Samba, resulting in a denial of service. (CVE-2019-14861)

Isaac Boukris discovered that Samba did not enforce the Kerberos
DelegationNotAllowed feature restriction, contrary to expectations.
(CVE-2019-14870)

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
19.10 eoan libsmbclient –  2:4.10.7+dfsg-0ubuntu2.3
samba –  2:4.10.7+dfsg-0ubuntu2.3
19.04 disco libsmbclient –  2:4.10.0+dfsg-0ubuntu2.7
samba –  2:4.10.0+dfsg-0ubuntu2.7
18.04 bionic libsmbclient –  2:4.7.6+dfsg~ubuntu-0ubuntu2.14
samba –  2:4.7.6+dfsg~ubuntu-0ubuntu2.14
16.04 xenial libsmbclient –  2:4.3.11+dfsg-0ubuntu0.16.04.24
samba –  2:4.3.11+dfsg-0ubuntu0.16.04.24

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References

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