6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:P/A:N
5.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
0.002 Low
EPSS
Percentile
62.1%
All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x
before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation
model includes a feature allowing for a subset of clients to be opted out
of constrained delegation in any way, either S4U2Self or regular Kerberos
authentication, by forcing all tickets for these clients to be
non-forwardable. In AD this is implemented by a user attribute
delegation_not_allowed (aka not-delegated), which translates to
disallow-forwardable. However the Samba AD DC does not do that for S4U2Self
and does set the forwardable flag even if the impersonated client has the
not-delegated flag set.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | samba | < 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | UNKNOWN |
ubuntu | 19.04 | noarch | samba | < 2:4.10.0+dfsg-0ubuntu2.7 | UNKNOWN |
ubuntu | 19.10 | noarch | samba | < 2:4.10.7+dfsg-0ubuntu2.3 | UNKNOWN |
ubuntu | 14.04 | noarch | samba | < 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm4 | UNKNOWN |
ubuntu | 16.04 | noarch | samba | < 2:4.3.11+dfsg-0ubuntu0.16.04.24 | UNKNOWN |
6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:P/A:N
5.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
0.002 Low
EPSS
Percentile
62.1%