CVE-2019-10190: Input Validation
First published: Tue Jul 16 2019(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nic Knot Resolver | <=3.2.0 | |
| Nic Knot Resolver | >=4.0.0<4.1.0 | |
| Fedoraproject Fedora | =29 | |
| Fedoraproject Fedora | =30 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190
- 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 the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-10190.
What is the severity level of CVE-2019-10190?
CVE-2019-10190 has a severity level of high, with a severity value of 7.5.
Which software versions are affected by CVE-2019-10190?
Knot Resolver versions up to and including 3.2.0, as well as Knot Resolver versions 4.0.0 to 4.1.0, are affected by CVE-2019-10190.
What is the impact of CVE-2019-10190?
CVE-2019-10190 allows remote attackers to bypass DNSSEC validation for non-existence answers, potentially leading to DNS spoofing or other types of attacks.
Are there any references or resources for CVE-2019-10190?
Yes, for more information about CVE-2019-10190, you can refer to the following resources: - [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190) - [Fedora Project Message 1](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/) - [Fedora Project Message 2](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/)
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- agent/softwarecombine
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- agent/references
- agent/author
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- version/fedoraproject fedora/29
- version/fedoraproject fedora/30