Vulnerability Details : CVE-2020-22552
Potential exploit
The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed.
Products affected by CVE-2020-22552
- cpe:2.3:a:snap7_project:snap7:1.4.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-22552
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-22552
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
References for CVE-2020-22552
-
https://sourceforge.net/projects/snap7/
Snap7 download | SourceForge.netExploit;Third Party Advisory
-
http://snap7.com
snap7.com - This website is for sale! - mobile app stock Resources and Information.Third Party Advisory
-
https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/
Snap7 / Discussion / Bugs reporting: SNAP7 will crash when Func Write and COTP last-data-unit flag is NoThird Party Advisory
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