Stack-Based Buffer Overflow in Siemens APOGEE and Desigo Products
CVE-2021-31886

9.8CRITICAL

Key Information:

Vendor

Siemens
Status
Apogee Mbc (ppc) (bacnet)
Apogee Mbc (ppc) (p2 Ethernet)
Apogee Mec (ppc) (bacnet)
Apogee Mec (ppc) (p2 Ethernet)
Vendor
CVE Published:
9 November 2021

What is CVE-2021-31886?

A vulnerability exists in Siemens APOGEE and Desigo products due to improper validation of the length of the 'USER' command in the FTP server. This oversight can lead to stack-based buffer overflows, potentially resulting in Denial-of-Service conditions and allowing remote code execution. Affected versions include various models of the APOGEE MBC, MEC, PXC, and Desigo, which could expose systems to significant risks if exploited.

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Deploy the Patch

Affected Version(s)

APOGEE MBC (PPC) (BACnet) All versions

APOGEE MBC (PPC) (P2 Ethernet) All versions

APOGEE MEC (PPC) (BACnet) All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-11458...
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https://cert-portal.siemens.com/productcert/pdf/ssa-04411...
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EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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