Cisco fixes remote code execution bug in VPN routers

By VARINDIA - 2022-08-04

Cisco fixes remote code execution bug in VPN routers

Cisco has fixed critical security vulnerabilities affecting Small Business VPN routers and enabling unauthenticated, remote attackers to execute arbitrary code or commands and trigger denial of service (DoS) conditions on vulnerable devices.

 

Tracked as CVE-2022-20842 and CVE-2022-20827, the security flaws were found in the web-based management interfaces and the web filter database update feature, both caused by insufficient input validation.

 

Successful exploitation of CVE-2022-20842 with crafted HTTP input could allow attackers “to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a DoS condition.” The CVE-2022-20827 exploits by submitting crafted input to the web filter database update feature can let threat actors “execute commands on the underlying operating system with root privileges.”

 

Cisco has released software updates to address both vulnerabilities and says there are no workarounds to remove the attack vectors. Cisco has also patched a third, high severity bug (CVE-2022-20841) in the Open Plug and Play (PnP) module of RV160, RV260, RV340, and RV345 series routers.


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