CVE-2019-15800: zyxel gs1900-10hp_firmware OS Command Injection

Vulnerability summary

CVE-2019-15800 is a high (CVSS 10.0) OS Command Injection vulnerability in zyxel gs1900-10hp_firmware. EPSS estimates a 3.87% chance of exploitation in the next 30 days, higher than 90% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 14-11-2019
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Due to lack of input validation in the cmd_sys_traceroute_exec(), cmd_sys_arp_clear(), and cmd_sys_ping_exec() functions in the libclicmd.so library contained in the firmware, an attacker could leverage these functions to call system() and execute arbitrary commands on the switches. (Note that these functions are currently not called in this version of the firmware, however an attacker could use other vulnerabilities to finally use these vulnerabilities to gain code execution.)

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.