CVE-2021-27393 Other in Nucleus NET
Insufficient UDP port randomization in the DNS client allows attackers to poison DNS cache or spoof DNS resolution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27393?
CVE-2021-27393 is a medium-severity vulnerability in Siemens Nucleus NET, published on 22 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-330
Which versions are affected by CVE-2021-27393?
It affects 3 products.
Products include Siemens Nucleus Net, Siemens Nucleus Readystart V3, Siemens Nucleus Source Code.
How do I fix CVE-2021-27393?
No fix has been published for CVE-2021-27393 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27393 being exploited?
There is no known exploitation of CVE-2021-27393 in the wild and no public exploit code.
Other vulnerabilities in Siemens Nucleus NET
- CVE-2020-15795 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27009 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27736 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27737 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27738 Memory corruption in APOGEE PXC Compact (BACnet)
Sources
Also known as GHSA-x7x4-r59j-h6w9.