CVE-2019-10191: Input Validation
First published: Tue Jul 16 2019(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nic Knot Resolver | <4.1.0 | |
| Fedoraproject Fedora | =29 | |
| Fedoraproject Fedora | =30 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191
- https://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
- https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
Frequently Asked Questions
What is CVE-2019-10191?
CVE-2019-10191 is a vulnerability discovered in DNS resolver of Knot Resolver before version 4.1.0.
How does CVE-2019-10191 affect systems?
CVE-2019-10191 allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening the possibility of domain hijack using attacks against insecure DNS protocol.
What is the severity of CVE-2019-10191?
CVE-2019-10191 has a severity rating of 7.5 (high).
Which software versions are affected by CVE-2019-10191?
Knot Resolver versions before 4.1.0, Fedora 29, and Fedora 30 are affected by CVE-2019-10191.
How can I fix CVE-2019-10191?
To fix CVE-2019-10191, update Knot Resolver to version 4.1.0 or later, or upgrade to a non-vulnerable version of Fedora.
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- agent/software-canonical-lookup
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- version/fedoraproject fedora/29
- version/fedoraproject fedora/30