CVE-2016-2125
Published: 19 December 2016
It was found that Samba before versions 4.5.3, 4.4.8, 4.3.13 always requested forwardable tickets when using Kerberos authentication. A service to which Samba authenticated using Kerberos could subsequently use the ticket to impersonate Samba to other services or domain users.
From the Ubuntu Security Team
Simo Sorce discovered that that Samba clients always requested a forwardable ticket when using Kerberos authentication. An attacker could use this to impersonate an authenticated user or service.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
samba Launchpad, Ubuntu, Debian |
precise |
Released
(2:3.6.25-0ubuntu0.12.04.5)
|
| trusty |
Released
(2:4.3.11+dfsg-0ubuntu0.14.04.4)
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(2:4.3.11+dfsg-0ubuntu0.16.04.3)
|
|
| yakkety |
Released
(2:4.4.5+dfsg-2ubuntu5.2)
|
|
| zesty |
Released
(2:4.4.5+dfsg-2ubuntu7)
|
|
|
samba4 Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Adjacent |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |