CVE-2018-1057 Missing authorization in Samba

High 8.8 Published 13 Mar 2018 Updated 5 Aug 2024

Authenticated users can modify any other user's password, including administrators, due to incorrect LDAP permission validation in Samba AD DC.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-1057?

CVE-2018-1057 is a high-severity missing authorization vulnerability in Canonical Ubuntu Linux, published on 13 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

On a Samba 4 AD DC the LDAP server in all versions of Samba from 4.0.0 onwards incorrectly validates permissions to modify passwords over LDAP allowing authenticated users to change any other users' passwords, including administrative users and privileged service accounts (eg Domain Controllers).

Weakness: CWE-863

Which versions are affected by CVE-2018-1057?

It affects 3 products.

Linux distribution packages (6)

`samba` SUSE:Enterprise Storage 5	All versions	`4.6.14+git.150.1540e575faf-3.24.1`
`samba` SUSE:Linux Enterprise Desktop 12 SP3	All versions	`4.6.14+git.150.1540e575faf-3.24.1`
`samba` SUSE:Linux Enterprise High Availability Extension 12 SP3	All versions	`4.6.14+git.150.1540e575faf-3.24.1`
`samba` SUSE:Linux Enterprise Server 12 SP3	All versions	`4.6.14+git.150.1540e575faf-3.24.1`
`samba` SUSE:Linux Enterprise Server for SAP Applications 12 SP3	All versions	`4.6.14+git.150.1540e575faf-3.24.1`
`samba` SUSE:Linux Enterprise Software Development Kit 12 SP3	All versions	`4.6.14+git.150.1540e575faf-3.24.1`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Samba Samba.

How do I fix CVE-2018-1057?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2018-1057 being exploited?

There is no known exploitation of CVE-2018-1057 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2018-1057, AZL-7346, DEBIAN-CVE-2018-1057, ECHO-1ee2-55c5-a468, GHSA-6r4h-vw53-wmvv, SUSE-SU-2018:1687-1 and 1 more.