CVE-2020-27274 Denial of service in OPC UA Tunneller
Attackers can cause a denial-of-service condition in the OPC UA Tunneller by triggering a failure in message parsing functions that do not check malloc return values.
- 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-2020-27274?
CVE-2020-27274 is a high-severity denial of service vulnerability in OPC UA Tunneller, published on 26 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).
Weakness: CWE-754
Which versions are affected by CVE-2020-27274?
It affects 1 product.
Products include Honeywell Opc Ua Tunneller.
How do I fix CVE-2020-27274?
No fix has been published for CVE-2020-27274 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-2020-27274 being exploited?
There is no known exploitation of CVE-2020-27274 in the wild and no public exploit code.
Other vulnerabilities in OPC UA Tunneller
Sources
Also known as GHSA-p5jr-488h-j8p7.