CVE-2021-23017

2021-05-2500:00:00

ubuntu.com

257

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.582 Medium

EPSS

Percentile

97.7%

JSON

A security issue in nginx resolver was identified, which might allow an
attacker who is able to forge UDP packets from the DNS server to cause
1-byte memory overwrite, resulting in worker process crash or potential
other impact.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchnginx< 1.14.0-0ubuntu1.9UNKNOWN
ubuntu20.04noarchnginx< 1.18.0-0ubuntu1.2UNKNOWN
ubuntu20.10noarchnginx< 1.18.0-6ubuntu2.2UNKNOWN
ubuntu21.04noarchnginx< 1.18.0-6ubuntu8.2UNKNOWN
ubuntu21.10noarchnginx< 1.18.0-6ubuntu9UNKNOWN
ubuntu22.04noarchnginx< 1.18.0-6ubuntu9UNKNOWN
ubuntu14.04noarchnginx< 1.4.6-1ubuntu3.9+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchnginx< 1.10.3-0ubuntu0.16.04.5+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	nginx	< 1.14.0-0ubuntu1.9	UNKNOWN
ubuntu	20.04	noarch	nginx	< 1.18.0-0ubuntu1.2	UNKNOWN
ubuntu	20.10	noarch	nginx	< 1.18.0-6ubuntu2.2	UNKNOWN
ubuntu	21.04	noarch	nginx	< 1.18.0-6ubuntu8.2	UNKNOWN
ubuntu	21.10	noarch	nginx	< 1.18.0-6ubuntu9	UNKNOWN
ubuntu	22.04	noarch	nginx	< 1.18.0-6ubuntu9	UNKNOWN
ubuntu	14.04	noarch	nginx	< 1.4.6-1ubuntu3.9+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	nginx	< 1.10.3-0ubuntu0.16.04.5+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN