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AUSCERT External Security Bulletin Redistribution
ESB-2019.1707.2
USN-3976: Samba vulnerability
28 May 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: samba
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Provide Misleading Information -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-16860
Reference: ESB-2019.1702
Original Bulletin:
https://usn.ubuntu.com/3976-1/
https://usn.ubuntu.com/3976-2/
Revision History: May 28 2019: USN-3976-1 introduced a regression in Samba
May 15 2019: Initial Release
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USN-3976-1: Samba vulnerability
14 May 2019
samba vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Samba could allow unintended access to network services.
Software Description
o samba - SMB/CIFS file, print, and login server for Unix
Details
Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly use
this issue to escalate privileges.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
samba - 2:4.10.0+dfsg-0ubuntu2.1
Ubuntu 18.10
samba - 2:4.8.4+dfsg-2ubuntu2.4
Ubuntu 18.04 LTS
samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.10
Ubuntu 16.04 LTS
samba - 2:4.3.11+dfsg-0ubuntu0.16.04.20
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
o CVE-2018-16860
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USN-3976-2: Samba vulnerability
14 May 2019
samba vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Summary
Samba could allow unintended access to network services.
Software Description
o samba - SMB/CIFS file, print, and login server for Unix
Details
USN-3976-1 fixed a vulnerability in Samba. This update provides the
corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly use
this issue to escalate privileges.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
samba - 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1
Ubuntu 12.04 ESM
samba - 2:3.6.25-0ubuntu0.12.04.18
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
o USN-3976-1
o CVE-2018-16860
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USN-3976-3: Samba regression
27 May 2019
samba regression
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
USN-3976-1 introduced a regression in Samba.
Software Description
o samba - SMB/CIFS file, print, and login server for Unix
Details
USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression
causing Samba to occasionally crash. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly use
this issue to escalate privileges.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.11
Ubuntu 16.04 LTS
samba - 2:4.3.11+dfsg-0ubuntu0.16.04.21
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
o USN-3976-1
o LP: 1827924
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USN-3976-4: Samba vulnerability
27 May 2019
samba vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
Summary
USN-3976-1 introduced a regression in Samba.
Software Description
o samba - SMB/CIFS file, print, and login server for Unix
Details
USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression
causing Samba to occasionally crash. This update fixes the problem.
Original advisory details:
Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly use
this issue to escalate privileges.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
samba - 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm2
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
o USN-3976-1
o LP: 1827924
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