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.

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...
x_refsource_MISC
https://cert-portal.siemens.com/productcert/pdf/ssa-04411...
x_refsource_MISC

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

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