Critical severity · published Jun 16, 2021
CVE-2021-20093
A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a
9.1
CVSS
33.3%
EPSS
No
On KEV
Description
A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)33.3% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Codemeter · Wibu
through 7.21a · source: NVD
PC
Pss Cape · Siemens
All versions, or not specified · source: NVD
S2
Sicam 230 Firmware · Siemens
All versions, or not specified · source: NVD
SI
Simatic Information Server · Siemens
2019; 2020 · source: NVD
SP
Simatic Pcs Neo · Siemens
before 3.1 · source: NVD
SP
Simatic Process Historian · Siemens
2019 before 2020; 2020 · source: NVD
SW
Simatic Wincc OA · Siemens
3.17; 3.18 · source: NVD
SS
Simit Simulation Platform · Siemens
10.0 before 10.3; 10.3 · source: NVD
SI
Sinec Infrastructure Network Services · Siemens
before 1.0.1.1; 1.0.1 · source: NVD
SR
Sinema Remote Connect Server · Siemens
before 3.0; 3.0; 3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20093
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20093
Mitigation
https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02
Exploit
https://www.tenable.com/security/research/tra-2021-24
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