VulnerabilityModified
CVE-2021-21005
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.
HIGH 7.5EPSS 0.68%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.68% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- phoenixcontact/fl switch smcs 16tx firmware · phoenixcontact/fl switch smcs 14tx\/2fx firmware · phoenixcontact/fl switch smcs 14tx\/2fx-sm firmware · phoenixcontact/fl switch smcs 8gt firmware · phoenixcontact/fl switch smcs 6gt\/2sfp firmware · phoenixcontact/fl switch smcs 8tx-pn firmware · phoenixcontact/fl switch smcs 4tx-pn firmware · phoenixcontact/fl switch smcs 8tx firmware · phoenixcontact/fl switch smcs 6tx\/2sfp firmware · phoenixcontact/fl switch smn 6tx\/2pof-pn firmware · phoenixcontact/fl switch smn 8tx-pn firmware · phoenixcontact/fl switch smn 6tx\/2fx firmware · phoenixcontact/fl switch smn 6tx\/2fx sm firmware · phoenixcontact/fl nat smn 8tx firmware · phoenixcontact/fl nat smn 8tx-m firmware
- Source
- info@cert.vde.com
References
- https://cert.vde.com/en-us/advisories/vde-2021-023Third Party Advisory
- https://cert.vde.com/en-us/advisories/vde-2021-023Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.