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ubuntuUbuntuUSN-4510-1
HistorySep 17, 2020 - 12:00 a.m.

Samba vulnerability

2020-09-1700:00:00
ubuntu.com
94

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

8.6 High

AI Score

Confidence

Low

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%

JSON

Releases

  • Ubuntu 18.04 ESM
  • Ubuntu 16.04 ESM

Packages

  • samba - SMB/CIFS file, print, and login server for Unix

Details

Tom Tervoort discovered that the Netlogon protocol implemented by Samba
incorrectly handled the authentication scheme. A remote attacker could use
this issue to forge an authentication token and steal the credentials of
the domain admin.

This update fixes the issue by changing the “server schannel” setting to
default to “yes”, instead of “auto”, which will force a secure netlogon
channel. This may result in compatibility issues with older devices. A
future update may allow a finer-grained control over this setting.

OSVersionArchitecturePackageVersionFilename
Ubuntu18.04noarchsamba< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchctdb< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchctdb-dbgsym< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibnss-winbind< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibnss-winbind-dbgsym< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibpam-winbind< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibpam-winbind-dbgsym< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibparse-pidl-perl< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibsmbclient< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Ubuntu18.04noarchlibsmbclient-dbgsym< 2:4.7.6+dfsg~ubuntu-0ubuntu2.19UNKNOWN
Rows per page:
1-10 of 741

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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

8.6 High

AI Score

Confidence

Low

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%

JSON
Related for USN-4510-1
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