Advisory Details

March 23rd, 2022

(Pwn2Own) NETGEAR R6700v3 upnpd Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2022-27643
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	NETGEAR
AFFECTED PRODUCTS	R6700v3
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of SOAP requests. When parsing the SOAPAction header, the process does not properly validate the length of user-supplied data prior to copying it to a buffer. An attacker can leverage this vulnerability to execute code in the context of root.
ADDITIONAL DETAILS	NETGEAR has issued an update to correct this vulnerability. More details can be found at: https://kb.netgear.com/000064720/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0323
DISCLOSURE TIMELINE	2021-12-03 - Vulnerability reported to vendor 2022-03-23 - Coordinated public release of advisory
CREDIT	Stephen Fewer of Relyze Software Limited (www.relyze.com)

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