Vulnerability Details : CVE-2021-27434
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.
Vulnerability category: Information leak
Products affected by CVE-2021-27434
- cpe:2.3:a:unified-automation:.net_based_opc_ua_client\/server_sdk:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27434
0.18%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 56 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27434
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-27434
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: ics-cert@hq.dhs.gov (Secondary)
-
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-27434
-
https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04
OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5 | CISAThird Party Advisory;US Government Resource
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