CVE-2021-44694
MEDIUMCVSS 5.5/10EPSS 0.62%
Last modified
CVE-2021-44694 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.. EPSS estimates a 0.62% chance of exploitation in the next 30 days.
Description
Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Simatic S7-Plcsim Advanced Firmware | < 5.0 |
| Siemens | Simatic S7-1200 Cpu 1211c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1212c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1212fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1214 Fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1214c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1214fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1215 Fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1215c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1215fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 1217c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1211c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1212c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1212fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1214c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1214fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1215c Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1215fc Firmware | < 4.6.0 |
| Siemens | Simatic S7-1200 Cpu 12 1217c Firmware | < 4.6.0 |
| Siemens | Siplus S7-1200 Cp 1243-1 Rail Firmware | < 4.6.0 |
| Siemens | Siplus S7-1200 Cp 1243-1 Firmware | < 4.6.0 |
| Siemens | Simatic S7-1500 Cpu 1507s Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1507s F Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1508s Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1508s F Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1510sp Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1510sp-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511-1 Pn Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511c Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511c-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511f-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511f-1 Pn Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511t-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1511tf-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1512c Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1512c-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1512sp-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1512spf-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1513-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1513-1 Pn Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1513f-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1513f-1 Pn Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1513r-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1515-2 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1515-2 Pn Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 151511c-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 151511f-1 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1515f-2 Firmware | < 3.0.1 |
| Siemens | Simatic S7-1500 Cpu 1515f-2 Pn Firmware | < 3.0.1 |
Showing 50 of 92 affected configurations. See NVD for the full list.
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdfPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-44694?
Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.
How severe is CVE-2021-44694?
CVE-2021-44694 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-44694?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-44694?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST