CVE-2021-34596 CODESYS V2 runtime: Access of Uninitialized Pointer may result in denial-of-service
A crafted request triggers a read access to an uninitialized pointer in CODESYS V2 Runtime, causing a denial-of-service condition.
- 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-2021-34596?
CVE-2021-34596 is a medium-severity vulnerability in CODESYS V2, published on 26 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.
Weakness: CWE-824
Which versions are affected by CVE-2021-34596?
It affects 30 products.
Products include Codesys Codesys, Codesys Plcwinnt, Codesys Runtime Toolkit, Wago 750-8202 Firmware, Wago 750-8203 Firmware, Wago 750-8204 Firmware and 24 more.
How do I fix CVE-2021-34596?
No fix has been published for CVE-2021-34596 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34596 being exploited?
There is no known exploitation of CVE-2021-34596 in the wild and no public exploit code.
Other vulnerabilities in CODESYS V2
Sources
Also known as GHSA-93x3-2r5r-4375.