DNS cache poisoning in totd

1) Use of insufficiently random values

EUVDB-ID: #VU66543

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2022-34294

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 uses a fixed UDP source port in upstream queries sent to DNS resolvers. A remote attacker can conduct DNS cache-poisoning attacks.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

totd: 1.5.2 - 1.5.3

External links

http://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
http://www.openwall.com/lists/oss-security/2022/08/14/2
http://www.blackhat.com/presentations/bh-jp-08/bh-jp-08-Kaminsky/BlackHat-Japan-08-Kaminsky-DNS08-BlackOps.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.