Lucene search

K
ubuntucveUbuntu.comUB:CVE-2020-1472
HistorySep 16, 2020 - 12:00 a.m.

CVE-2020-1472

2020-09-1600:00:00
ubuntu.com
ubuntu.com
49

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

8 High

AI Score

Confidence

High

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.451 Medium

EPSS

Percentile

97.4%

An elevation of privilege vulnerability exists when an attacker establishes
a vulnerable Netlogon secure channel connection to a domain controller,
using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully
exploited the vulnerability could run a specially crafted application on a
device on the network. To exploit the vulnerability, an unauthenticated
attacker would be required to use MS-NRPC to connect to a domain controller
to obtain domain administrator access. Microsoft is addressing the
vulnerability in a phased two-part rollout. These updates address the
vulnerability by modifying how Netlogon handles the usage of Netlogon
secure channels. For guidelines on how to manage the changes required for
this vulnerability and more information on the phased rollout, see How to
manage the changes in Netlogon secure channel connections associated with
CVE-2020-1472 (updated September 28, 2020). When the second phase of
Windows updates become available in Q1 2021, customers will be notified via
a revision to this security vulnerability. If you wish to be notified when
these updates are released, we recommend that you register for the security
notifications mailer to be alerted of content changes to this advisory. See
Microsoft Technical Security Notifications.

Bugs

Notes

Author Note
mdeslaur Starting with Samba 4.8, “server schannel” defaults to “yes” instead of “auto”. This is sufficient to address this vulnerability. See details in the upstream bug report. There may be an additional commit to make ServerAuthenticate3 fail so that the false positive reported by the third party vulnerability scanning tools is fixed.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchsamba< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
ubuntu14.04noarchsamba< 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchsamba< 2:4.3.11+dfsg-0ubuntu0.16.04.30UNKNOWN

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

8 High

AI Score

Confidence

High

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.451 Medium

EPSS

Percentile

97.4%