CVE-2021-40142 Memory corruption in n/a
Remote attackers can cause a denial of service in OPC Foundation Local Discovery Server by sending crafted messages that trigger a buffer over-read.
- 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-2021-40142?
CVE-2021-40142 is a high-severity memory corruption vulnerability in Siemens Telecontrol Server Basic, published on 27 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.
Weakness: CWE-119
Which versions are affected by CVE-2021-40142?
It affects 7 products.
Products include Opcfoundation Local Discover Server, Siemens Simatic Net Pc, Siemens Simatic Process Historian Opc Ua Server Firmware, Siemens Simatic Wincc, Siemens Simatic Wincc Runtime, Siemens Simatic Wincc Unified Scada Runtime and 1 more.
How do I fix CVE-2021-40142?
No fix has been published for CVE-2021-40142 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-40142 being exploited?
There is no known exploitation of CVE-2021-40142 in the wild and no public exploit code.
Sources
Also known as GHSA-5524-cf37-2p8f.