Vulnerability · Published May 20, 2021 · Assigned by icscert
CVE-2021-27434
High 7.5
In plain English
A high-severity information exposure in OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.7%top 22.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5 | Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) |
Weakness: CWE-200
References
- https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04 x_refsource_MISC