CVE-2021-27393
published 2021-04-22CVE-2021-27393: A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including…
PriorityP428medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
EPSS
0.75%
50.7th percentile
A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| siemens | nucleus_net | — | — |
| siemens | nucleus_readystart_v3 | < 2013.08 | 2013.08 |
| siemens | nucleus_readystart_v3 | — | — |
| siemens | nucleus_source_code | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
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GHSA
GHSA-x7x4-r59j-h6w9: A vulnerability has been identified in Nucleus NET (All versions), Nucleus RTOS (versions including affected DNS modules), Nucleus ReadyStart (All ver
ghsa_unreviewed·2022-05-24
CVE-2021-27393 [MEDIUM] CWE-330 GHSA-x7x4-r59j-h6w9: A vulnerability has been identified in Nucleus NET (All versions), Nucleus RTOS (versions including affected DNS modules), Nucleus ReadyStart (All ver
A vulnerability has been identified in Nucleus NET (All versions), Nucleus RTOS (versions including affected DNS modules), Nucleus ReadyStart (All versions < V2013.08), Nucleus Source Code (versions including affected DNS modules), VSTAR (versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving.
CISA ICS
Siemens Nucleus DNS (Update A)
cisa_ics·2021-04-13·CVSS 5.3
[MEDIUM] Siemens Nucleus DNS (Update A)
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Siemens Nucleus DNS (Update A)
Last RevisedJanuary 13, 2022
Alert CodeICSA-21-103-14
## 1. EXECUTIVE SUMMARY
- CVSS v3 5.3
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: Nucleus
- Vulnerability: Use of Insufficiently Random Values
## 2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled ICSA-21-103-14 Siemens Nucleus DNS that was published April 13, 2021, to the ICS webpage on www.cisa.gov/uscert.
## 3. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to pois
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-04-22
Published