Security restrictions bypass in MaraDNS

1) Resource management error

EUVDB-ID: #VU77839

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-2022-30256

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass expected security restrictions.

The vulnerability exists due to the way MaraDNS handles cached domain names. A revoked domain name can still be resolvable for a long time, including expired domains and taken-down malicious domains.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MaraDNS: 3.4.01 - 3.5.0021

External links

http://maradns.samiam.org/
http://maradns.samiam.org/security.html#CVE-2022-30256
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3VSMLJX25MXGQ6A7UPOGK7VPUVDESPHL/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NB7LDZM5AGWC5BHHQHW6CP5OFNBBKFOQ/
http://lists.debian.org/debian-lts-announce/2023/06/msg00019.html
http://www.debian.org/security/2023/dsa-5441

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.