CVE-2021-27391

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-27391
A vulnerability has been identified in APOGEE MBC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE MEC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE PXC Compact (BACnet) (All versions < V3.5.3), APOGEE PXC Compact (P2 Ethernet) (All versions >= V2.8), APOGEE PXC Modular (BACnet) (All versions < V3.5.3), APOGEE PXC Modular (P2 Ethernet) (All versions >= V2.8), TALON TC Compact (BACnet) (All versions < V3.5.3), TALON TC Modular (BACnet) (All versions < V3.5.3). The web server of affected devices lacks proper bounds checking when parsing the Host parameter in HTTP requests, which could lead to a buffer overflow. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the device with root privileges.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0 /10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References
Link Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-944498.pdf Patch Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-944498.pdf Patch Vendor Advisory
Configurations

Configuration 1 (hide)

AND
cpe:2.3:o:siemens:apogee_mbc_\(ppc\)_\(p2_ethernet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:apogee_mbc_\(ppc\)_\(p2_ethernet\):*:*:*:*:*:*:*:*

Configuration 2 (hide)

AND
cpe:2.3:o:siemens:apogee_mec_\(ppc\)_\(p2_ethernet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:apogee_mec_\(ppc\)_\(p2_ethernet\):*:*:*:*:*:*:*:*

Configuration 3 (hide)

AND
cpe:2.3:o:siemens:apogee_pxc_bacnet_automation_controller_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:apogee_pxc_bacnet_automation_controller:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND
cpe:2.3:o:siemens:apogee_pxc_compact_\(p2_ethernet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:apogee_pxc_compact_\(p2_ethernet\):*:*:*:*:*:*:*:*

Configuration 5 (hide)

AND
cpe:2.3:o:siemens:apogee_pxc_modular_\(bacnet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:apogee_pxc_modular_\(bacnet\):*:*:*:*:*:*:*:*

Configuration 6 (hide)

AND
cpe:2.3:o:siemens:apogee_pxc_modular_\(p2_ethernet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:apogee_pxc_modular_\(p2_ethernet\):*:*:*:*:*:*:*:*

Configuration 7 (hide)

AND
cpe:2.3:o:siemens:talon_tc_compact_\(bacnet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:talon_tc_compact_\(bacnet\):*:*:*:*:*:*:*:*

Configuration 8 (hide)

AND
cpe:2.3:o:siemens:talon_tc_modular_\(bacnet\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:siemens:talon_tc_modular_\(bacnet\):*:*:*:*:*:*:*:*
History

No history.

Information

Published : 2021-09-14 11:15

Updated : 2025-04-23 20:15

NVD link : CVE-2021-27391

Mitre link : CVE-2021-27391

CVE.ORG link : CVE-2021-27391

JSON object : View

Products Affected

siemens

  • apogee_pxc_bacnet_automation_controller
  • apogee_pxc_modular_\(p2_ethernet\)_firmware
  • apogee_mbc_\(ppc\)_\(p2_ethernet\)_firmware
  • apogee_pxc_bacnet_automation_controller_firmware
  • talon_tc_compact_\(bacnet\)_firmware
  • talon_tc_compact_\(bacnet\)
  • apogee_pxc_modular_\(bacnet\)
  • talon_tc_modular_\(bacnet\)_firmware
  • apogee_mec_\(ppc\)_\(p2_ethernet\)
  • apogee_mec_\(ppc\)_\(p2_ethernet\)_firmware
  • apogee_pxc_compact_\(p2_ethernet\)_firmware
  • apogee_pxc_compact_\(p2_ethernet\)
  • apogee_pxc_modular_\(p2_ethernet\)
  • talon_tc_modular_\(bacnet\)
  • apogee_mbc_\(ppc\)_\(p2_ethernet\)
  • apogee_pxc_modular_\(bacnet\)_firmware
CWE
CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')