4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
36.9%
Issue Overview:
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora and Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option local-service
is not enabled. Running dnsmasq in this manner may inadvertently make it an open resolver accessible from any address on the internet. This flaw allows an attacker to conduct a Distributed Denial of Service (DDoS) against other systems. (CVE-2020-14312)
Affected Packages:
dnsmasq
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update dnsmasq to update your system.
New Packages:
aarch64:
dnsmasq-2.76-10.amzn2.1.1.aarch64
dnsmasq-utils-2.76-10.amzn2.1.1.aarch64
dnsmasq-debuginfo-2.76-10.amzn2.1.1.aarch64
i686:
dnsmasq-2.76-10.amzn2.1.1.i686
dnsmasq-utils-2.76-10.amzn2.1.1.i686
dnsmasq-debuginfo-2.76-10.amzn2.1.1.i686
src:
dnsmasq-2.76-10.amzn2.1.1.src
x86_64:
dnsmasq-2.76-10.amzn2.1.1.x86_64
dnsmasq-utils-2.76-10.amzn2.1.1.x86_64
dnsmasq-debuginfo-2.76-10.amzn2.1.1.x86_64
Red Hat: CVE-2020-14312
Mitre: CVE-2020-14312
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | dnsmasq | < 2.76-10.amzn2.1.1 | dnsmasq-2.76-10.amzn2.1.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | dnsmasq-utils | < 2.76-10.amzn2.1.1 | dnsmasq-utils-2.76-10.amzn2.1.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | dnsmasq-debuginfo | < 2.76-10.amzn2.1.1 | dnsmasq-debuginfo-2.76-10.amzn2.1.1.aarch64.rpm |
Amazon Linux | 2 | i686 | dnsmasq | < 2.76-10.amzn2.1.1 | dnsmasq-2.76-10.amzn2.1.1.i686.rpm |
Amazon Linux | 2 | i686 | dnsmasq-utils | < 2.76-10.amzn2.1.1 | dnsmasq-utils-2.76-10.amzn2.1.1.i686.rpm |
Amazon Linux | 2 | i686 | dnsmasq-debuginfo | < 2.76-10.amzn2.1.1 | dnsmasq-debuginfo-2.76-10.amzn2.1.1.i686.rpm |
Amazon Linux | 2 | x86_64 | dnsmasq | < 2.76-10.amzn2.1.1 | dnsmasq-2.76-10.amzn2.1.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | dnsmasq-utils | < 2.76-10.amzn2.1.1 | dnsmasq-utils-2.76-10.amzn2.1.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | dnsmasq-debuginfo | < 2.76-10.amzn2.1.1 | dnsmasq-debuginfo-2.76-10.amzn2.1.1.x86_64.rpm |
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
36.9%