CVE-2019-10191
published 2019-07-16CVE-2019-10191: A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to…
PriorityP339high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
1.93%
77.5th percentile
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cz.nic | knot-resolver | — | — |
| cz.nic | knot-resolver | — | — |
| cz.nic | knot-resolver | >= 0 < 5.0.1-1 | 5.0.1-1 |
| cz.nic | knot-resolver | >= 0 < 5.0.1-1 | 5.0.1-1 |
| cz.nic | knot-resolver | >= 0 < 5.0.1-1 | 5.0.1-1 |
| cz.nic | knot-resolver | >= 0 < 5.0.1-1 | 5.0.1-1 |
| cz.nic | knot-resolver | >= 0 < 3.2.1-3ubuntu2.2 | 3.2.1-3ubuntu2.2 |
| debian | knot-resolver | < knot-resolver 5.0.1-1 (bookworm) | knot-resolver 5.0.1-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| nic | knot_resolver | < 4.1.0 | 4.1.0 |
| nic | knot_resolver | <= 3.2.0 | — |
| nic | knot_resolver | >= 4.0.0 < 4.1.0 | 4.1.0 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv3.06.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
osv7.5HIGH
vendor_debian7.5HIGH
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OSV
knot-resolver vulnerabilities
osv·2024-10-01·CVSS 7.5
CVE-2019-10190 [HIGH] knot-resolver vulnerabilities
knot-resolver vulnerabilities
Vladimír Čunát discovered that Knot Resolver incorrectly handled input
during DNSSEC validation. A remote attacker could possibly use this issue
to bypass certain validations. (CVE-2019-10190)
Vladimír Čunát discovered that Knot Resolver incorrectly handled input
during DNSSEC validation. A remote attacker could possibly use this issue
to downgrade DNSSEC-secure domains to a DNSSEC-insecure state, resulting
in a domain hijacking attack. (CVE-2019-10191)
Vladimír Čunát discovered that Knot Resolver incorrectly handled certain
DNS replies with many resource records. An attacker could possibly use
this issue to consume system resources, resulting in a denial of service.
(CVE-2019-19331)
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Knot
Reso
GHSA
GHSA-5w8c-g2pj-65rx: A vulnerability was discovered in DNS resolver of knot resolver before version 4
ghsa_unreviewed·2022-05-24
CVE-2019-10191 [HIGH] CWE-20 GHSA-5w8c-g2pj-65rx: A vulnerability was discovered in DNS resolver of knot resolver before version 4
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
GHSA
GHSA-5pqr-9wpj-5m82: A vulnerability was discovered in DNS resolver component of knot resolver through version 3
ghsa_unreviewed·2022-05-24·CVSS 7.5
CVE-2019-10190 [HIGH] CWE-20 GHSA-5pqr-9wpj-5m82: A vulnerability was discovered in DNS resolver component of knot resolver through version 3
A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.
OSV
CVE-2019-10190: A vulnerability was discovered in DNS resolver component of knot resolver through version 3
osv·2019-07-16·CVSS 7.5
CVE-2019-10190 [HIGH] CVE-2019-10190: A vulnerability was discovered in DNS resolver component of knot resolver through version 3
A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.
OSV
CVE-2019-10191: A vulnerability was discovered in DNS resolver of knot resolver before version 4
osv·2019-07-16·CVSS 7.5
CVE-2019-10191 [HIGH] CVE-2019-10191: A vulnerability was discovered in DNS resolver of knot resolver before version 4
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Debian
CVE-2019-10191: knot-resolver - A vulnerability was discovered in DNS resolver of knot resolver before version 4...
vendor_debian·2019·CVSS 7.5
CVE-2019-10191 [HIGH] CVE-2019-10191: knot-resolver - A vulnerability was discovered in DNS resolver of knot resolver before version 4...
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Scope: local
bookworm: resolved (fixed in 5.0.1-1)
bullseye: resolved (fixed in 5.0.1-1)
forky: resolved (fixed in 5.0.1-1)
sid: resolved (fixed in 5.0.1-1)
trixie: resolved (fixed in 5.0.1-1)
Debian
CVE-2019-10190: knot-resolver - A vulnerability was discovered in DNS resolver component of knot resolver throug...
vendor_debian·2019·CVSS 7.5
CVE-2019-10190 [HIGH] CVE-2019-10190: knot-resolver - A vulnerability was discovered in DNS resolver component of knot resolver throug...
A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.
Scope: local
bookworm: resolved (fixed in 5.0.1-1)
bullseye: resolved (fixed in 5.0.1-1)
forky: resolved (fixed in 5.0.1-1)
sid: resolved (fixed in 5.0.1-1)
trixie: resolved (fixed in 5.0.1-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer [epel-7]
bugzilla·2019-07-15·CVSS 7.5
CVE-2019-10191 [HIGH] CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer [epel-7]
CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer [epel-7]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-7.
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 com
Bugzilla
CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer [fedora-all]
bugzilla·2019-07-15·CVSS 7.5
CVE-2019-10191 [HIGH] CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer [fedora-all]
CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer [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
fe
Bugzilla
CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer
bugzilla·2019-07-05·CVSS 7.5
CVE-2019-10191 [HIGH] CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer
CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attacker to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Discussion:
Acknowledgments:
Name: Petr Špaček (CZ.NIC)
Upstream: Vladimír Čunát (CZ.NIC)
---
Created knot-resolver tracking bugs for this issue:
Affects: epel-7 [bug 1729827]
Affects: fedora-all [bug 1729826]
---
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191https://lists.debian.org/debian-lts-announce/2024/04/msg00017.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191https://lists.debian.org/debian-lts-announce/2024/04/msg00017.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html
2019-07-16
Published