Out-of-Bounds Read and Write Vulnerability in Siemens APOGEE and Desigo Products
CVE-2021-31884

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-2021-31884?

A flaw in various Siemens products allows for out-of-bounds read and write operations due to improper handling of the 'Hostname' DHCP option. This vulnerability can lead to potential information leakage and denial-of-service conditions when the global hostname variable is not defined. Attackers exploiting this vulnerability may gain unauthorized access or disrupt service, affecting operational continuity.

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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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https://cert-portal.siemens.com/productcert/pdf/ssa-62028...
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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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