CVE-2020-27632 Weak cryptography in n/a
An attacker can predict TCP session identifiers to hijack sessions on SIMATIC MV400 devices due to weak random number generation.
- 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-2020-27632?
CVE-2020-27632 is a high-severity vulnerability in n/a, published on 10 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions.
Which versions are affected by CVE-2020-27632?
It affects 2 products.
Products include Siemens Simatic Mv420 Firmware, Siemens Simatic Mv440 Firmware.
How do I fix CVE-2020-27632?
No fix has been published for CVE-2020-27632 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-27632 being exploited?
There is no known exploitation of CVE-2020-27632 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-53pq-r3c7-x97x.