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ubuntucveUbuntu.comUB:CVE-2021-3672
HistoryAug 10, 2021 - 12:00 a.m.

CVE-2021-3672

2021-08-1000:00:00
ubuntu.com
ubuntu.com
21

CVSS2

6.8

Attack Vector

NETWORK

Attack 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

CVSS3

5.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

EPSS

0.002

Percentile

52.8%

A flaw was found in c-ares library, where a missing input validation check
of host names returned by DNS (Domain Name Servers) can lead to output of
wrong hostnames which might potentially lead to Domain Hijacking. The
highest threat from this vulnerability is to confidentiality and integrity
as well as system availability.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchc-ares< 1.14.0-1ubuntu0.1UNKNOWN
ubuntu20.04noarchc-ares< 1.15.0-1ubuntu0.1UNKNOWN
ubuntu21.04noarchc-ares< 1.17.1-1ubuntu0.1UNKNOWN
ubuntu21.10noarchc-ares< 1.17.1-1ubuntu1UNKNOWN
ubuntu22.04noarchc-ares< 1.17.1-1ubuntu1UNKNOWN
ubuntu16.04noarchc-ares< 1.10.0-3ubuntu0.2+esm1UNKNOWN

CVSS2

6.8

Attack Vector

NETWORK

Attack 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

CVSS3

5.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

EPSS

0.002

Percentile

52.8%