Vulnerability identifier: #VU66537

Vulnerability 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-2022-33989

CWE-ID: CWE-330

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
dproxy
Server applications / DNS servers

Vendor: dproxy

Description

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

The vulnerability exists due to dproxy uses a static UDP source port, which is selected randomly only at boot time, 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

dproxy: 0.5

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External links
http://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
http://www.openwall.com/lists/oss-security/2022/08/14/3

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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.