Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2019-10191 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Knot Resolver Server applications / Other server solutions |
Vendor | Nic |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU22593
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-10191
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to hijack domain on the target system.
The vulnerability exists due to insufficient validation of user-supplied input in DNS resolver. A remote attacker can downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
MitigationInstall updates from vendor's website.
Vulnerable software versionsKnot Resolver: 1.0 - 4.0.0
CPE2.3http://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.