CVE-2021-42023 Weak cryptography in ModelSim Simulation
A sophisticated attacker can discover built-in private keys in ModelSim and Questa Simulation, bypassing IEEE 1735 protections to decrypt intellectual property data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-42023?
CVE-2021-42023 is a medium-severity vulnerability in Siemens ModelSim Simulation, published on 14 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been identified in ModelSim Simulation (All versions), Questa Simulation (All versions). The RSA white-box implementation in affected applications insufficiently protects the built-in private keys that are required to decrypt electronic intellectual property (IP) data in accordance with the IEEE 1735 recommended practice. This could allow a sophisticated attacker to discover the keys, bypassing the protection intended by the IEEE 1735 recommended practice.
Weakness: CWE-522
Which versions are affected by CVE-2021-42023?
It affects 2 products.
Products include Siemens Modelsim, Siemens Questa.
How do I fix CVE-2021-42023?
No fix has been published for CVE-2021-42023 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-42023 being exploited?
There is no known exploitation of CVE-2021-42023 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Siemens ModelSim Simulation
Sources
Also known as GHSA-x8jw-8x39-62fp.