CVE-2020-14312
published 2021-02-06CVE-2020-14312: A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, where it…
PriorityP429medium5.9CVSS 3.1
AVNACHPRNUINSUCNINAH
EPSS
1.23%
65.2th percentile
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions 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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | dnsmasq | < dnsmasq 2.69-1 (bookworm) | dnsmasq 2.69-1 (bookworm) |
| fedoraproject | fedora | < 31 | 31 |
| thekelleys | dnsmasq | >= 0 < 2.69-1 | 2.69-1 |
| thekelleys | dnsmasq | >= 0 < 2.69-1 | 2.69-1 |
| thekelleys | dnsmasq | >= 0 < 2.69-1 | 2.69-1 |
| thekelleys | dnsmasq | >= 0 < 2.69-1 | 2.69-1 |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
osv5.9MEDIUM
vendor_debian5.9MEDIUM
vendor_redhat5.9MEDIUM
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Red Hat
dnsmasq: insecure default configuration makes it an open resolver
vendor_redhat·2020-06-30·CVSS 5.9
CVE-2020-14312 [MEDIUM] CWE-284 dnsmasq: insecure default configuration makes it an open resolver
dnsmasq: insecure default configuration makes it an open resolver
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions 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.
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
Debian
CVE-2020-14312: dnsmasq - A flaw was found in the default configuration of dnsmasq, as shipped with Fedora...
vendor_debian·2020·CVSS 5.9
CVE-2020-14312 [MEDIUM] CVE-2020-14312: dnsmasq - A flaw was found in the default configuration of dnsmasq, as shipped with Fedora...
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions 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.
Scope: local
bookworm: resolved (fixed in 2.69-1)
bullseye: resolved (fixed in 2.69-1)
forky: resolved (fixed in 2.69-1)
sid: resolved (fixed in 2.69-1)
trixie: resolved (fixed in 2.69-1)
GHSA
GHSA-xr95-5hhj-crp6: A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, wh
ghsa_unreviewed·2022-05-24
CVE-2020-14312 [MEDIUM] CWE-284 GHSA-xr95-5hhj-crp6: A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, wh
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions 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.
OSV
CVE-2020-14312: A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, wh
osv·2021-02-06·CVSS 5.9
CVE-2020-14312 [MEDIUM] CVE-2020-14312: A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, wh
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions 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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-14312 dnsmasq: insecure default configuration makes it an open resolver [fedora-all]
bugzilla·2020-06-30·CVSS 5.9
CVE-2020-14312 [MEDIUM] CVE-2020-14312 dnsmasq: insecure default configuration makes it an open resolver [fedora-all]
CVE-2020-14312 dnsmasq: insecure default configuration makes it an open resolver [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple su
Bugzilla
CVE-2020-14312 dnsmasq: insecure default configuration makes it an open resolver
bugzilla·2020-06-26·CVSS 5.9
CVE-2020-14312 [MEDIUM] CVE-2020-14312 dnsmasq: insecure default configuration makes it an open resolver
CVE-2020-14312 dnsmasq: insecure default configuration makes it an open resolver
dnsmasq, as shipped with Fedora and Red Hat Enterprise Linux, has a default configuration that makes it listen on any interface and accept queries from addresses outside of its local subnet. In particular, the option `local-service` is not enabled. Users that enable dnsmasq on their system with its default configuration may inadvertently make it an open resolver accessible from any address on the internet, potentially being involved in Distributed Denial of Service (DDoS) attacks against a victim.
Discussion:
Mitigation:
To restrict the DNS server to queries coming from the local subnet, add `local-service` to your /etc/dnsmasq.conf file or in a file in /etc/dnsmasq.d. A firewall can be configured for addi
2021-02-06
Published