Vulnerabilities

An issue discovered in Linksys E5600 routers allows attackers to hijack TCP sessions which could lead to a denial of service.

Linksys E3000 1.0.06.002_US is vulnerable to command injection via the diag_ping_start function.

A vulnerability was found in Linksys WRT54G 4.21.5. It has been rated as critical. Affected by this issue is the function validate_services_port of the file /apply.cgi of the component POST Parameter Handler. The manipulation of the argument services_array leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

A Command Injection vulnerability exists in the do_upgrade_post function of the httpd binary in Linksys E1500 v1.0.06.001. As a result, an authenticated attacker can execute OS commands with root privileges.

A vulnerability was discovered in Linksys Router E2500 with firmware 2.0.00, allows authenticated attackers to execute arbitrary code via the hnd_parentalctrl_unblock function.

Linksys WRT54G v4.21.5 has a stack overflow vulnerability in get_merge_mac function.

Insecure permissions in Linksys Velop WiFi 5 (WHW01v1) 1.1.13.202617 allows attackers to escalate privileges from Guest to root.

Linksys E5600 v1.1.0.26 was discovered to contain a command injection vulnerability via the PinCode parameter at /API/info form endpoint.

Linksys E5600 v1.1.0.26 was discovered to contain a command injection vulnerability via the ipurl parameter at /API/info form endpoint.

Linksys RE7000 v2.0.9, v2.0.11, and v2.0.15 have a command execution vulnerability in the "AccessControlList" parameter of the access control function point. An attacker can use the vulnerability to obtain device administrator rights.

There is stack-based buffer overflow vulnerability in pc_change_act function in Linksys E1000 router firmware version v.2.1.03 and before, leading to remote code execution.

Linksys E2000 Ver.1.0.06 build 1 is vulnerable to authentication bypass via the position.js file.

An issue was discovered in Linksys Router E1700 1.0.04 (build 3), allows authenticated attackers to escalate privileges via a crafted GET request to the /goform/* URI or via the ExportSettings function.

An issue was discovered in Linksys Router E1700 version 1.0.04 (build 3), allows authenticated attackers to execute arbitrary code via the setDateTime function.

A vulnerability was found in Linksys WRT54GL 4.30.18. It has been declared as problematic. This vulnerability affects unknown code of the file /SysInfo1.htm of the component Web Management Interface. The manipulation leads to information disclosure. The exploit has been disclosed to the public and may be used. VDB-253330 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability was found in Linksys WRT54GL 4.30.18. It has been classified as problematic. This affects an unknown part of the file /wlaninfo.htm of the component Web Management Interface. The manipulation leads to information disclosure. The exploit has been disclosed to the public and may be used. The identifier VDB-253329 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability was found in Linksys WRT54GL 4.30.18 and classified as problematic. Affected by this issue is some unknown functionality of the file /SysInfo.htm of the component Web Management Interface. The manipulation leads to information disclosure. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-253328. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

An arbitrary code exection vulnerability exists in Linksys WUMC710 Wireless-AC Universal Media Connector with firmware <= 1.0.02 (build3). The do_setNTP function within the httpd binary uses unvalidated user input in the construction of a system command. An authenticated attacker with administrator privileges can leverage this vulnerability over the network via a malicious GET or POST request to /setNTP.cgi to execute arbitrary commands on the underlying Linux operating system as root.

An arbitrary code execution vulnerability exisits in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. The Check_TSSI function within the httpd binary uses unvalidated user input in the construction of a system command. An authenticated attacker with administrator privileges can leverage this vulnerability over the network via a malicious POST request to /apply.cgi to execute arbitrary commands on the underlying Linux operating system as root.

A buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in the Start_EPI function within the httpd binary allows an authenticated attacker with administrator privileges to execute arbitrary commands on the underlying Linux operating system as root. This vulnerablity can be triggered over the network via a malicious POST request to /apply.cgi.

A null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereference in the soap_action function within the upnp binary can be triggered by an unauthenticated attacker via a malicious POST request invoking the AddPortMapping action.

Command injection vulnerability in Linksys MR8300 router while Registration to DDNS Service. By specifying username and password, an attacker connected to the router's web interface can execute arbitrary OS commands. The username and password fields are not sanitized correctly and are used as URL construction arguments, allowing URL redirection to an arbitrary server, downloading an arbitrary script file, and eventually executing the file in the device. This issue affects: Linksys MR8300 Router 1.0.

An exploitable operating system command injection exists in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04). Specially crafted entries to network configuration information can cause execution of arbitrary system commands, resulting in full control of the device. An attacker can send an authenticated HTTP request to trigger this vulnerability. Data entered into the 'Domain Name' input field through the web portal is submitted to apply.cgi as the value to the 'wan_domain' POST parameter. The wan_domain data goes through the nvram_set process described above. When the 'preinit' binary receives the SIGHUP signal it enters a code path that calls a function named 'set_host_domain_name' from its libshared.so shared object.

Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. When the 'preinit' binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the 'start_lltd' function. Within the 'start_lltd' function, a 'nvram_get' call is used to obtain the value of the user-controlled 'machine_name' NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed.

Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAMData entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. When the 'preinit' binary receives the SIGHUP signal it enters a code path that calls a function named 'set_host_domain_name' from its libshared.so shared object.

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Linksys WVBR0. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web management portal. The issue lies in the lack of proper validation of user data before executing a system call. An attacker could leverage this vulnerability to execute code with root privileges. Was ZDI-CAN-4892.