CVE-2021-30186 Memory corruption in n/a
A heap-based buffer overflow in the CODESYS V2 runtime system allows attackers to execute arbitrary code or cause a denial of service.
- 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-2021-30186?
CVE-2021-30186 is a high-severity memory corruption vulnerability in n/a, published on 25 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.
Weakness: CWE-787
Which versions are affected by CVE-2021-30186?
It affects 29 products.
Products include Codesys Plcwinnt, Codesys Runtime Toolkit, Wago 750-8202 Firmware, Wago 750-8203 Firmware, Wago 750-8204 Firmware, Wago 750-8206 Firmware and 23 more.
How do I fix CVE-2021-30186?
No fix has been published for CVE-2021-30186 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-2021-30186 being exploited?
There is no known exploitation of CVE-2021-30186 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2022-31806 Insecure default settings in CODESYS Runtime Toolkit 32 bit full and CODESYS PLCWinNT
- CVE-2022-32137 CODESYS Runtime System prone to heap based buffer overflow
- CVE-2022-32138 CODESYS runtime system prone to denial of service due to Unexpected Sign Extension
- CVE-2022-32143 CODESYS runtime system prone to directory acces
- CVE-2022-1965 CODESYS runtime system prone to file deletion due to improper error handling
Sources
Also known as GHSA-9ppp-5qxh-r7w5.