Tenda AC18 setsambacfg formSetSambaConf os command injection

A vulnerability classified as critical has been found in Tenda AC18 15.03.05.05. Affected is the function formSetSambaConf of the file /goform/setsambacfg. The manipulation of the argument usbName leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-257778 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Tenda AC18 V15.03.05.05 has a stack overflow vulnerability in the entrys parameter fromAddressNat function.

Tenda AC18 V15.03.05.05 has a stack overflow vulnerability in the mitInterface parameter of fromAddressNat function.

Tenda AC18 router v15.03.05.19 and v15.03.05.05 was discovered to contain a stack overflow via the urls parameter at /goform/saveParentControlInfo.

Tenda AC18 router v15.03.05.19 and v15.03.05.05 was discovered to contain a stack overflow via the time parameter at /goform/saveParentControlInfo.

Tenda AC18 router v15.03.05.19 and v15.03.05.05 was discovered to contain a stack overflow via the list parameter at /goform/SetIpMacBind.

Tenda AC18 router v15.03.05.19 and v15.03.05.05 was discovered to contain a stack overflow via the time parameter at /goform/PowerSaveSet.

Tenda AC18 router v15.03.05.19 and v15.03.05.05 was discovered to contain a stack overflow via the list parameter at /goform/SetStaticRouteCfg.

Tenda AC18 router v15.03.05.19 and v15.03.05.05 was discovered to contain a stack overflow via the list parameter at /goform/SetVirtualServerCfg.

Tenda-AC18 V15.03.05.05 was discovered to contain a remote command execution (RCE) vulnerability.

Tenda AC Series Router AC18_V15.03.05.19(6318) was discovered to contain a stack-based buffer overflow in the httpd module when handling /goform/SetClientState request.

Tenda AC Series Router AC18_V15.03.05.19(6318) was discovered to contain a stack-based buffer overflow in the httpd module when handling /goform/SetFirewallCfg request.

Tenda AC Series Router AC18_V15.03.05.19(6318) was discovered to contain a stack-based buffer overflow in the httpd module when handling /goform/WifiExtraSet request.

Tenda AC Series Router AC18_V15.03.05.19(6318) was discovered to contain a heap overflow in the httpd module when handling /goform/saveParentControlInfo request.

Tenda AC Series Router AC18_V15.03.05.19(6318) has a stack-based buffer overflow vulnerability in function form_fast_setting_wifi_set

Tenda AC Seris Router AC18_V15.03.05.19(6318) has a stack-based buffer overflow vulnerability in function fromAddressNat

An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the 'ntpServer' parameter for a post request, the value is directly used in a strcpy to a local variable placed on the stack, which overrides the return address of the function.

An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the 'deviceMac' parameter for a post request, the value is directly used in a sprintf to a local variable placed on the stack, which overrides the return address of the function.

An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the 'startIp' and 'endIp' parameters for a post request, each value is directly used in a sprintf to a local variable placed on the stack, which overrides the return address of the function.

An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a heap-based buffer overflow vulnerability in the router's web server -- httpd. While processing the 'mac' parameter for a post request, the value is directly used in a strcpy to a variable placed on the heap, which can leak sensitive information or even hijack program control flow.