#VU66536 Insufficient verification of data authenticity in dproxy - CVE-2022-33988

Vulnerability identifier: #VU66536

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-33988

CWE-ID: CWE-345

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 re-uses the DNS transaction id (TXID) value from client queries. A remote attacker with ability to send requests to DNS resolver 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
https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
https://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.