CVE-2021-3849: An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthen...

Summary

An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.

What to do

Update lenovo nextscale_n1200_enclosure_firmware to version fhet50b-2.90 or later.
Update lenovo thinkagile_hx_enclosure_certified_node_firmware to version tesm28b-1.21 or later.
Update lenovo thinkagile_vx_enclosure_firmware to version tesm28b-1.21 or later.
Update lenovo thinksystem_d2_enclosure_firmware to version tesm28b-1.21 or later.
Update ibm nextscale_fan_power_controller_firmware to version 44a-3.70 or later.

Affected software

Vendor	Product	Affected versions
lenovo	nextscale_n1200_enclosure_firmware	< fhet50b-2.90 `cpe:2.3:o:lenovo:nextscale_n1200_enclosure_firmware::::::::`
lenovo	thinkagile_hx_enclosure_certified_node_firmware	< tesm28b-1.21 `cpe:2.3:o:lenovo:thinkagile_hx_enclosure_certified_node_firmware::::::::`
lenovo	thinkagile_vx_enclosure_firmware	< tesm28b-1.21 `cpe:2.3:o:lenovo:thinkagile_vx_enclosure_firmware::::::::`
lenovo	thinksystem_d2_enclosure_firmware	< tesm28b-1.21 `cpe:2.3:o:lenovo:thinksystem_d2_enclosure_firmware::::::::`
ibm	nextscale_fan_power_controller_firmware	< 44a-3.70 `cpe:2.3:o:ibm:nextscale_fan_power_controller_firmware::::::::`

Original advisory text

An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthen...

An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.

References

https://support.lenovo.com/us/en/product_security/LEN-72615 Vendor Advisory