Riskcovery

CVE-2021-21005

Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products

State
Published
Severity
7.5 High
Published
Jun 25, 2021
Updated
Sep 17, 2024
Reserved
Dec 17, 2020

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCERTVDE

Weaknesses

  • CWE-362 Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)

Affected Products

ProductVersions
FL SWITCHPhoenix Contact
  • SMCS 16TX (2700996) through 4.70Affected
  • SMCS 14TX/2FX (2700997) through 4.70Affected
  • SMCS 14TX/2FX-SM (2701466) through 4.70Affected
  • SMCS 8GT (2891123) through 4.70Affected
  • SMCS 6GT/2SFP (2891479) through 4.70Affected
  • SMCS 8TX-PN (2989103) through 4.70Affected
  • SMCS 4TX-PN (2989093) through 4.70Affected
  • SMCS 8TX (2989226) through 4.70Affected
  • SMCS 6TX/2SFP (2989323) through 4.70Affected
  • SMN 6TX/2POF-PN (2700290) through 4.70Affected
  • SMN 8TX-PN (2989501) through 4.70Affected
  • SMN 6TX/2FX (2989543) through 4.70Affected
  • SMN 6TX/2FX SM (2989556) through 4.70Affected
FL NATPhoenix Contact
  • SMN 8TX (2989365) through 4.63Affected
  • SMN 8TX-M (2702443) through 4.63Affected

References

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