CVE-2021-34947

NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055. It has a CVSS v3.1 base score of 8.8 (HIGH).

CVE-2021-34947 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

CVE-2021-34947 affects products from netgear, specifically: d7800, d7800_firmware, ex2700, ex2700_firmware, ex6100, ex6100_firmware, ex6150, ex6150_firmware, ex6200, ex6200_firmware, ex6250, ex6250_firmware, ex6400, ex6400_firmware, ex6400v2, ex6400v2_firmware, ex6410, ex6410_firmware, ex6420, ex6420_firmware, ex6500v1, ex6500v1_firmware, ex7300, ex7300_firmware, ex7300v2, ex7300v2_firmware, ex7320, ex7320_firmware, ex7700, ex7700_firmware, ex8000, ex8000_firmware, lbr1020, lbr1020_firmware, lbr20, lbr20_firmware, r6700ax, r6700ax_firmware, r7800, r7800_firmware, r8900, r8900_firmware, r9000, r9000_firmware, rax10, rax10_firmware, rax120, rax120_firmware, rax120v2, rax120v2_firmware, rax70, rax70_firmware, rax78, rax78_firmware, rbr10, rbr10_firmware, rbr20, rbr20_firmware, rbr40, rbr40_firmware, rbr50, rbr50_firmware, rbs10, rbs10_firmware, rbs20, rbs20_firmware, rbs40, rbs40_firmware, rbs50, rbs50_firmware, rbs50y, rbs50y_firmware, wn3000rpv2, wn3000rpv2_firmware, wnr2000v5, wnr2000v5_firmware, xr450, xr450_firmware, xr500, xr500_firmware, xr700, xr700_firmware. Check the affected products table above for specific version ranges.

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.