#VU31360 Input validation error in Knot Resolver - CVE-2018-1000002

Vulnerability identifier: #VU31360

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1000002

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Knot Resolver
Server applications / Other server solutions

Vendor: Nic

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Improper input validation bugs in DNSSEC validators components in Knot Resolver (prior version 1.5.2) allow attacker in man-in-the-middle position to deny existence of some data in DNS via packet replay.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Knot Resolver: 1.5.0 - 1.5.1

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External links
https://www.knot-resolver.cz/2018-01-22-knot-resolver-1.5.2.html

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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.