CVE-2021-21005 (GCVE-0-2021-21005)

Vulnerability from cvelistv5 – Published: 2021-06-25 18:25 – Updated: 2024-09-17 02:17
VLAI
Title
Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
Impacted products
Vendor Product Version
Phoenix Contact FL SWITCH Affected: SMCS 16TX (2700996) , ≤ 4.70 (custom)
Affected: SMCS 14TX/2FX (2700997) , ≤ 4.70 (custom)
Affected: SMCS 14TX/2FX-SM (2701466) , ≤ 4.70 (custom)
Affected: SMCS 8GT (2891123) , ≤ 4.70 (custom)
Affected: SMCS 6GT/2SFP (2891479) , ≤ 4.70 (custom)
Affected: SMCS 8TX-PN (2989103) , ≤ 4.70 (custom)
Affected: SMCS 4TX-PN (2989093) , ≤ 4.70 (custom)
Affected: SMCS 8TX (2989226) , ≤ 4.70 (custom)
Affected: SMCS 6TX/2SFP (2989323) , ≤ 4.70 (custom)
Affected: SMN 6TX/2POF-PN (2700290) , ≤ 4.70 (custom)
Affected: SMN 8TX-PN (2989501) , ≤ 4.70 (custom)
Affected: SMN 6TX/2FX (2989543) , ≤ 4.70 (custom)
Affected: SMN 6TX/2FX SM (2989556) , ≤ 4.70 (custom)
Create a notification for this product.
Phoenix Contact FL NAT Affected: SMN 8TX (2989365) , ≤ 4.63 (custom)
Affected: SMN 8TX-M (2702443) , ≤ 4.63 (custom)
Create a notification for this product.
Date Public
2021-06-23 00:00
Credits
This vulnerability has been discovered and reported by Anne Borcherding, Fraunhofer- Institut für Optronik, Systemtechnik und Bildauswertung IOSB. PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication.
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  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.