#VU103643 Reliance on Reverse DNS Resolution for a Security-Critical Action in Lightbend - CVE-2023-31442

Vulnerability identifier: #VU103643

Vulnerability risk: High

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

CVE-ID: CVE-2023-31442

CWE-ID: CWE-350

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Lightbend
Other software / Other software solutions

Vendor: Akka Project

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to async-dns resolver (used by Discovery in DNS mode and transitively by Cluster Bootstrap) uses predictable DNS transaction IDs when resolving DNS records. A remote attacker can exploit the vulnerability to perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Lightbend: before 2.8.1

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External links
https://akka.io/security/akka-async-dns-2023-31442.html
https://akka.io/security/akka-async-dns-2023-31442.html
https://lightbend.com
https://lightbend.com

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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.