CVE-2021-21005
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductPhoenixcontact Fl Switch Smcs 16tx Firmware
PublishedJun 25, 2021
First seenJun 25, 2021
Weakness typeCWE-362Race condition
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| phoenixcontact fl_switch_smcs_16tx_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_14tx\/2fx_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_14tx\/2fx-sm_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_8gt_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_6gt\/2sfp_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_8tx-pn_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_4tx-pn_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_8tx_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smcs_6tx\/2sfp_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smn_6tx\/2pof-pn_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smn_8tx-pn_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smn_6tx\/2fx_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_switch_smn_6tx\/2fx_sm_firmware | v ≤ 4.70 | — |
| phoenixcontact fl_nat_smn_8tx_firmware | v ≤ 4.63 | — |
| phoenixcontact fl_nat_smn_8tx-m_firmware | v ≤ 4.63 | — |
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