OS Command Injection in Mgetty+Sendfax - CVE-2018-16741

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Main Vulnerability Database Vulnerabilities #VU15169

OS Command Injection in Mgetty+Sendfax - CVE-2018-16741

Published: October 8, 2018


Vulnerability identifier: #VU15169
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-16741
CWE-ID: CWE-78
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: EDV-Beratung Gert Döring
Affected software:
Mgetty+Sendfax

Detailed vulnerability description

The vulnerability allows a local user to execute arbitrary shell commands on the target system.

The vulnerability exists within mgetty before 1.2.1. In fax/faxq-helper.c, the function do_activate() due to improper sanitization of shell metacharacters. A local user can use ||, &&, or > characters within a file created by the "faxq-helper activate <jobid>" command to execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


How to mitigate CVE-2018-16741

Install update from vendor's website.

Sources