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ubuntuUbuntuUSN-4454-1
HistoryAug 10, 2020 - 12:00 a.m.

Samba vulnerability

2020-08-1000:00:00
ubuntu.com
67
samba vulnerability
ubuntu 20.04 lts
ubuntu 18.04 esm
ubuntu 16.04 esm
smb/cifs
denial of service
remote attack

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.5

Confidence

High

EPSS

0.016

Percentile

87.5%

Releases

  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM
  • Ubuntu 16.04 ESM

Packages

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

Details

Martin von Wittich and Wilko Meyer discovered that Samba incorrectly
handled certain empty UDP packets when being used as a AD DC NBT server. A
remote attacker could possibly use this issue to cause Samba to crash,
resulting in a denial of service.

OSVersionArchitecturePackageVersionFilename
Ubuntu20.04noarchsamba< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchctdb< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchctdb-dbgsym< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibnss-winbind< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibnss-winbind-dbgsym< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibpam-winbind< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibpam-winbind-dbgsym< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibsmbclient< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibsmbclient-dbgsym< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
Ubuntu20.04noarchlibsmbclient-dev< 2:4.11.6+dfsg-0ubuntu1.4UNKNOWN
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CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.5

Confidence

High

EPSS

0.016

Percentile

87.5%