CVE-2016-2119
Published: 7 July 2016
libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.
Notes
Author | Note |
---|---|
sbeattie | workaround in upstream report |
Priority
Status
Package | Release | Status |
---|---|---|
samba Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(4.x only)
|
trusty |
Released
(2:4.3.11+dfsg-0ubuntu0.14.04.1)
|
|
upstream |
Needed
|
|
wily |
Ignored
(end of life)
|
|
xenial |
Released
(2:4.3.11+dfsg-0ubuntu0.16.04.1)
|
|
yakkety |
Not vulnerable
(2:4.4.5+dfsg-2ubuntu5)
|
|
zesty |
Not vulnerable
(2:4.4.5+dfsg-2ubuntu5)
|
|
samba4 Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |