The vulnerability of the do_activate() function in the mgetty package allows a hacker to execute arbitrary commands.

The vulnerability of the doactivate function in the mgetty package is related to the lack of measures taken to neutralize special elements used in the operating system commands. Exploiting this vulnerability allows an attacker to execute arbitrary commands using symbols like ||, &&, or...

CVE-2018-16741: Improper Neutralization of Special Elements used in an OS Command

An issue was discovered in mgetty before 1.2.1. In fax/faxq-helper.c, the function doactivate does not properly sanitize shell metacharacters to prevent command injection. It is possible to use the ||, &&, or characters within a file created by the "faxq-helper activate " command...