CVE-2021-43083 Apache PLC4X 0.9.0 Buffer overflow in PLC4C via crafted server response
An attacker can trigger an integer underflow in the C implementation by sending a malicious response, potentially causing code execution or denial of service.
- 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-2021-43083?
CVE-2021-43083 is a high-severity vulnerability in Apache PLC4X, published on 19 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Apache PLC4X - PLC4C (Only the C language implementation was effected) was vulnerable to an unsigned integer underflow flaw inside the tcp transport. Users should update to 0.9.1, which addresses this issue. However, in order to exploit this vulnerability, a user would have to actively connect to a mallicious device which could send a response with invalid content. Currently we consider the probability of this being exploited as quite minimal, however this could change in the future, especially with the industrial networks growing more and more together.
Which versions are affected by CVE-2021-43083?
It affects 1 product.
Products include Apache Plc4x.
How do I fix CVE-2021-43083?
No fix has been published for CVE-2021-43083 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-43083 being exploited?
There is no known exploitation of CVE-2021-43083 in the wild and no public exploit code.
Sources
Also known as GHSA-f935-qq4f-pj9f.