Denial of service in Miek Gieben DNS library for Go

1) NULL pointer dereference

EUVDB-ID: #VU76830

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-17419

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the setTA() function in scan_rr.go caused by the dns.ParseZone() parsing error. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

DNS library in Go: 1.0.0 - 1.0.9

CPE2.3

• cpe:2.3:a:miekg:dns_library:1.0.0:*:*:*:*:golang:*:*
• cpe:2.3:a:miekg:dns_library:1.0.1:*:*:*:*:golang:*:*
• cpe:2.3:a:miekg:dns_library:1.0.2:*:*:*:*:golang:*:*

External links

https://github.com/miekg/dns/issues/742

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.