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CVE-2020-14383

Published: 29 October 2020

A flaw was found in samba's DNS server. An authenticated user could use this flaw to the RPC server to crash. This RPC server, which also serves protocols other than dnsserver, will be restarted after a short delay, but it is easy for an authenticated non administrative attacker to crash it again as soon as it returns. The Samba DNS server itself will continue to operate, but many RPC services will not.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
samba
Launchpad, Ubuntu, Debian
upstream
Released (4.11.15,4.12.9,4.13.1)
bionic
Released (2:4.7.6+dfsg~ubuntu-0ubuntu2.21)
focal
Released (2:4.11.6+dfsg-0ubuntu1.6)
groovy
Released (2:4.12.5+dfsg-3ubuntu4.1)
hirsute
Released (2:4.12.5+dfsg-3ubuntu4.1)
trusty
Released (2:4.3.11+dfsg-0ubuntu0.14.04.20+esm11)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (2:4.3.11+dfsg-0ubuntu0.16.04.32)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H