VulnerabilityModified
CVE-2021-20093
A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a.
CRITICAL 9.1EPSS 33.3%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 33.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 33.30% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- wibu/codemeter · siemens/pss cape · siemens/sicam 230 firmware · siemens/simatic information server · siemens/simatic pcs neo · siemens/simatic wincc oa · siemens/simit simulation platform · siemens/sinec infrastructure network services · siemens/sinema remote connect server · siemens/simatic process historian
- Source
- vulnreport@tenable.com
References
- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdfMitigation, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdfPatch, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02Third Party Advisory, US Government Resource
- https://www.tenable.com/security/research/tra-2021-24Exploit, Patch, Third Party Advisory
- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdfMitigation, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdfPatch, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02Third Party Advisory, US Government Resource
- https://www.tenable.com/security/research/tra-2021-24Exploit, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.