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CVE-2021-21005

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CVE-2021-21005

Published: Jun 25, 2021

Modified: Sep 17, 2024

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

In Phoenix Contact FL SWITCH SMCS series products in multiple versions if an attacker sends a hand-crafted TCP-Packet with the Urgent-Flag set and the Urgent-Pointer set to 0, the network stack will crash. The device needs to be rebooted afterwards.

VendorProductVersions

Phoenix Contact

FL SWITCH

affected
SMCS 16TX (2700996) - <= 4.70
affected
SMCS 14TX/2FX (2700997) - <= 4.70
affected
SMCS 14TX/2FX-SM (2701466) - <= 4.70
affected
SMCS 8GT (2891123) - <= 4.70
affected
SMCS 6GT/2SFP (2891479) - <= 4.70

+8 more versions

Phoenix Contact

FL NAT

affected
SMN 8TX (2989365) - <= 4.63
affected
SMN 8TX-M (2702443) - <= 4.63

Weaknesses (CWE)

CWE-362

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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