CVE-2021-34568 WAGO I/O-Check Service prone to Allocation of Resources Without Limits or Throttling
Unauthenticated remote attackers can cause denial of service in WAGO I/O-Check Service by sending specially crafted packets.
- 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-2021-34568?
CVE-2021-34568 is a high-severity denial of service vulnerability in WAGO 750-81xx/xxx-xxxFW, published on 9 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service.
Weakness: CWE-770
Which versions are affected by CVE-2021-34568?
It affects 49 products.
Products include Wago 750-8100 Firmware, Wago 750-8101\/025-000 Firmware, Wago 750-8101 Firmware, Wago 750-8102\/025-000 Firmware, Wago 750-8102 Firmware, Wago 750-8202\/000-011 Firmware and 43 more.
How do I fix CVE-2021-34568?
No fix has been published for CVE-2021-34568 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-34568 being exploited?
There is no known exploitation of CVE-2021-34568 in the wild and no public exploit code.
Other vulnerabilities in WAGO 750-81xx/xxx-xxxFW
- CVE-2021-34569 WAGO I/O-Check Service prone to Out-of-bounds Write
- CVE-2021-34566 WAGO I/O-Check Service prone to Memory Overflow
- CVE-2021-34567 WAGO I/O-Check Service prone to Out-of-bounds Read
- CVE-2022-3281 WAGO: multiple products - Loss of MAC-Address-Filtering after reboot
- CVE-2022-22511 WAGO PLCs WBM vulnerable to reflected XSS
Sources
Also known as GHSA-7vmm-73pm-mh7f.