CVE-2021-38703 — HIGH (8.8)

Vulnerability Description

Wireless devices running certain Arcadyan-derived firmware (such as KPN Experia WiFi 1.00.15) do not properly sanitise user input to the syslog configuration form. An authenticated remote attacker could leverage this to alter the device configuration and achieve remote code execution. This can be exploited in conjunction with CVE-2021-20090.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Kpn	Experia Wifi Firmware	1.00.15
Kpn	Experia Wifi	-

References

https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/ExploitThird Party Advisory
https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2Vendor Advisory
https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/ExploitThird Party Advisory
https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2Vendor Advisory

FAQ

What is CVE-2021-38703?

CVE-2021-38703 is a vulnerability with a CVSS score of 8.8 (HIGH). Wireless devices running certain Arcadyan-derived firmware (such as KPN Experia WiFi 1.00.15) do not properly sanitise user input to the syslog configuration form. An authenticated remote attacker cou...

How severe is CVE-2021-38703?

CVE-2021-38703 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-38703?

Check the references section above for vendor advisories and patch information. Affected products include: Kpn Experia Wifi Firmware, Kpn Experia Wifi.