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redhatcveRedhat.comRH:CVE-2020-14383
HistoryOct 29, 2020 - 11:29 a.m.

CVE-2020-14383

2020-10-2911:29:29
redhat.com
access.redhat.com
12

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.004 Low

EPSS

Percentile

73.6%

A flaw was found in Samba’s DNS server. This flaw allows an authenticated user to crash the RPC server. The RPC server, which also serves protocols other than the DNS server, is restarted after a short delay, however, an authenticated non-administrative attacker can cause a crash as soon as it returns. The Samba DNS server continues to operate, but many RPC services do not. The highest threat from this vulnerability is system availability.

Mitigation

The dnsserver task can be stopped by setting

'dcerpc endpoint servers = -dnsserver'

in the smb.conf and restarting Samba.

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.004 Low

EPSS

Percentile

73.6%