Vulnerabilities > CVE-2017-18788 - Injection vulnerability in Netgear products
Summary
Certain NETGEAR devices are affected by command injection by an authenticated user. This affects D3600 before 1.0.0.67, D6000 before 1.0.0.67, D6100 before 1.0.0.56, D6200 before 1.1.00.24, D6220 before 1.0.0.32, D6400 before 1.0.0.66, D7000 before 1.0.1.52, D7000v2 before 1.0.0.44, D7800 before 1.0.1.30, D8500 before 1.0.3.35, DGN2200v4 before 1.0.0.96, DGN2200Bv4 before 1.0.0.96, EX2700 before 1.0.1.28, EX6150v2 before 1.0.1.54, EX6100v2 before 1.0.1.54, EX6200v2 before 1.0.1.52, EX6400 before 1.0.1.72, EX7300 before 1.0.1.72, EX8000 before 1.0.0.102, JNR1010v2 before 1.1.0.44, JWNR2010v5 before 1.1.0.44, PR2000 before 1.0.0.20, R6100 before 1.0.1.20, R6250 before 1.0.4.16, R6300v2 before 1.0.4.18, R6400 before 1.0.1.32, R6400v2 before 1.0.2.46, R6700 before 1.0.1.36, R6900 before 1.0.1.34, R7000 before 1.0.9.18, R6900P before 1.3.0.8, R7000P before 1.3.0.8, R7100LG before 1.0.0.34, R7300DST before 1.0.0.58, R7500 before 1.0.0.118, R7500v2 before 1.0.3.24, R7800 before 1.0.2.40, R7900 before 1.0.2.4, R8000 before 1.0.4.4_1.1.42, R7900P before 1.1.5.14, R8000P before 1.1.5.14, R8300 before 1.0.2.110, R8500 before 1.0.2.110, R9000 before 1.0.2.52, WN2000RPTv3 before 1.0.1.14, WN3000RPv3 before 1.0.2.50, WN3100RPv2 before 1.0.0.40, WNDR3400v3 before 1.0.1.16, WNDR3700v4 before 1.0.2.94, WNDR4300 before 1.0.2.96, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, WNR1000v4 before 1.1.0.44, WNR2000v5 before 1.0.0.62, WNR2020 before 1.1.0.44, WNR2050 before 1.1.0.44, and WNR3500Lv2 before 1.2.0.46.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
- Subverting Environment Variable Values The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.