DNS cache poisoning in totd

1) Use of insufficiently random values

EUVDB-ID: #VU66542

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-2022-34295

CWE-ID: CWE-330 - Use of Insufficiently Random Values

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DNS cache poisoning attacks.

The vulnerability exists due to totd does not properly randomize message IDs. A remote attacker can send specially crafted DNS packets to the server and poison the DNS cache.

Mitigation

Install update from vendor's website.

Vulnerable software versions

totd: 1.5.2

External links

http://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
http://github.com/fwdillema/totd/commit/afd8a10a6a21f82a70940d1b43cff48143250399
http://github.com/fwdillema/totd/releases/tag/1.5.3
http://www.hit.bme.hu/~lencse/publications/JCST-Apr14-2.pdf

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.