Vulnerability Details : CVE-2021-34584
Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2021-34584
Probability of exploitation activity in the next 30 days: 0.26%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 62 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-34584
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:P |
10.0
|
4.9
|
NIST |
|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
3.9
|
5.2
|
CERT VDE |
|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
3.9
|
5.2
|
NIST |
CWE ids for CVE-2021-34584
-
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.Assigned by: info@cert.vde.com (Primary)
References for CVE-2021-34584
-
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=
Vendor Advisory
-
https://www.tenable.com/security/research/tra-2021-47
CODESYS V2 Web Server Multiple Vulnerabilities - Research Advisory | Tenable®Exploit;Third Party Advisory
Products affected by CVE-2021-34584
- cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:*