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 | |
| debian/knot-resolver | 5.3.1-1+deb11u1 5.6.0-1+deb12u1 5.7.4-2 | |
| <4.1.0 | ||
| =29 | ||
| =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
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10191
- https://nvd.nist.gov/vuln/detail/CVE-2019-10191
- https://launchpad.net/bugs/cve/CVE-2019-10191
- https://security-tracker.debian.org/tracker/CVE-2019-10191
- https://ubuntu.com/security/CVE-2019-10191
- https://gitlab.labs.nic.cz/knot/knot-resolver/merge_requests/839
- https://www.openwall.com/lists/oss-security/2019/07/14/1
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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