DNS cache poisoning in uClibc

1) Predictable Exact Value from Previous Values

EUVDB-ID: #VU72145

Risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2022-30295

CWE-ID: CWE-342 - Predictable Exact Value from Previous Values

Exploit availability: No

Description

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

The vulnerability exists due to software uses predictable DNS transaction IDs. A remote attacker can perform DNS cache poisoning.

Mitigation

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

Vulnerable software versions

uClibC: 0.9.1 - 0.9.33.2

External links

http://www.nozominetworks.com/blog/nozomi-networks-discovers-unpatched-dns-bug-in-popular-c-standard-library-putting-iot-at-risk/
http://www.kb.cert.org/vuls/id/473698

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.