---
id: CVE-2017-13734
title: >-
  There is an illegal address access in the _nc_safe_strcat function in
  strings.c in ncurses 6.0 that will lead to a remote denial of service attack.
summary: >-
  There is an illegal address access in the _nc_safe_strcat function in
  strings.c in ncurses 6.0 that will lead to a remote denial of service attack.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-119
vendor: invisible-island
product: ncurses
affected:
  - ncurses = 6.0
published: '2017-08-29'
updated: '2026-07-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2017-13734'
references:
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1484291'
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/201804-13'
    label: cve@mitre.org
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1484291'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/201804-13'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.02378
epssPercentile: 0.82988
ingestedAt: '2026-07-23T19:19:13.015Z'
---

## Overview

There is an illegal address access in the _nc_safe_strcat function in strings.c in ncurses 6.0 that will lead to a remote denial of service attack.

## Affected

- `ncurses = 6.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.