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cvelistSiemensCVELIST:CVE-2021-27391
HistorySep 14, 2021 - 10:47 a.m.

CVE-2021-27391

2021-09-1410:47:31
CWE-120
siemens
www.cve.org
2
vulnerability
buffer overflow
apogee
talon
arbitrary code execution
web server
remote attacker

AI Score

9.9

Confidence

High

EPSS

0.008

Percentile

82.2%

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.

CNA Affected

[
  {
    "product": "APOGEE MBC (PPC) (P2 Ethernet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions >= V2.6.3"
      }
    ]
  },
  {
    "product": "APOGEE MEC (PPC) (P2 Ethernet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions >= V2.6.3"
      }
    ]
  },
  {
    "product": "APOGEE PXC Compact (BACnet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V3.5.3"
      }
    ]
  },
  {
    "product": "APOGEE PXC Compact (P2 Ethernet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions >= V2.8"
      }
    ]
  },
  {
    "product": "APOGEE PXC Modular (BACnet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V3.5.3"
      }
    ]
  },
  {
    "product": "APOGEE PXC Modular (P2 Ethernet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions >= V2.8"
      }
    ]
  },
  {
    "product": "TALON TC Compact (BACnet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V3.5.3"
      }
    ]
  },
  {
    "product": "TALON TC Modular (BACnet)",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V3.5.3"
      }
    ]
  }
]

AI Score

9.9

Confidence

High

EPSS

0.008

Percentile

82.2%

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