Security restrictions bypass in Knot Resolver



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-10920
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Knot Resolver
Server applications / Other server solutions

Vendor Nic

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU14571

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10920

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to an error in DNS resolver component when processing malicious input. A remote attacker can supply specially crafted data, bypass security restrictions and poison cache.

Mitigation

Update to version 2.4.1.

Vulnerable software versions

Knot Resolver: 1.0 - 2.4

CPE2.3 External links

https://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.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.



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