CVE-2021-40873 Use after free in n/a
Remote attackers can cause a denial of service by sending crafted messages that trigger a double free, crashing the OPC UA server or client process.
- 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-2021-40873?
CVE-2021-40873 is a high-severity use after free vulnerability in n/a, published on 10 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66, and uaToolkit Embedded before 1.40. Remote attackers to cause a denial of service (DoS) by sending crafted messages to a client or server. The server process may crash unexpectedly because of a double free, and must be restarted.
Weakness: CWE-415
Which versions are affected by CVE-2021-40873?
It affects 7 products.
Products include Softing Datafeed Opc Suite, Softing Edgeconnector, Softing Opc, Softing Secure Integration Server, Softing Th Scope, Softing Uagates and 1 more.
How do I fix CVE-2021-40873?
No fix has been published for CVE-2021-40873 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-40873 being exploited?
There is no known exploitation of CVE-2021-40873 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-4jmj-7wjp-8959.