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Ubuntu Security Notice USN-3595-1

Ubuntu Security Notice USN-3595-1
Posted Mar 13, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3595-1 - Bjorn Baumbach discovered that Samba incorrectly validated permissions when changing account passwords via LDAP. An authenticated attacker could use this issue to change the password of other users, including administrators, and perform actions as those users. It was discovered that Samba incorrectly validated inputs to the RPC spoolss service. An authenticated attacker could use this issue to cause the service to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2018-1050, CVE-2018-1057
MD5 | 53ea89518cd086c2dabca11c525030fe

Ubuntu Security Notice USN-3595-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3595-1
March 13, 2018

samba vulnerabilities
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Samba.

Software Description:
- samba: SMB/CIFS file, print, and login server for Unix

Details:

Bjorn Baumbach discovered that Samba incorrectly validated permissions when
changing account passwords via LDAP. An authenticated attacker could use this
issue to change the password of other users, including administrators, and
perform actions as those users. (CVE-2018-1057)

It was discovered that Samba incorrectly validated inputs to the RPC spoolss
service. An authenticated attacker could use this issue to cause the service to
crash, resulting in a denial of service. (CVE-2018-1050)

Update instructions:

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

Ubuntu 17.10:
samba 2:4.6.7+dfsg-1ubuntu3.2
samba-dsdb-modules 2:4.6.7+dfsg-1ubuntu3.2

Ubuntu 16.04 LTS:
samba 2:4.3.11+dfsg-0ubuntu0.16.04.13
samba-dsdb-modules 2:4.3.11+dfsg-0ubuntu0.16.04.13

Ubuntu 14.04 LTS:
samba 2:4.3.11+dfsg-0ubuntu0.14.04.14
samba-dsdb-modules 2:4.3.11+dfsg-0ubuntu0.14.04.14

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

References:
https://usn.ubuntu.com/usn/usn-3595-1
CVE-2018-1050, CVE-2018-1057

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.6.7+dfsg-1ubuntu3.2
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.13
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.14
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