#VU31209 Buffer overflow in Mgetty+Sendfax - CVE-2018-16743

Vulnerability identifier: #VU31209

Vulnerability risk: Low

CVSSv4.0: 5.9 [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-2018-16743

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Mgetty+Sendfax
Client/Desktop applications / Other client software

Vendor: EDV-Beratung Gert Döring

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

An issue was discovered in mgetty before 1.2.1. In contrib/next-login/login.c, the command-line parameter username is passed unsanitized to strcpy(), which can cause a stack-based buffer overflow.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Mgetty+Sendfax: 1.2.0

---

External links
https://www.x41-dsec.de/lab/advisories/x41-2018-007-mgetty

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.