---
id: CVE-2018-17828
title: >-
  Directory traversal vulnerability in ZZIPlib 0.13.69 allows attackers to
  overwrite arbitrary files via a .
summary: >-
  Directory traversal vulnerability in ZZIPlib 0.13.69 allows attackers to
  overwrite arbitrary files via a .. (dot dot) in a zip file, because of the
  function unzzip_cat in the bins/unzzipcat-mem.c file.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'
cwe:
  - CWE-22
vendor: gdraheim
product: zziplib
affected:
  - zziplib = 0.13.69
published: '2018-10-01'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T18:17:14.510'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-17828'
references:
  - url: 'https://github.com/gdraheim/zziplib/issues/62'
    label: cve@mitre.org
  - url: 'https://github.com/gdraheim/zziplib/issues/62'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T17:34:39.564476Z'
epss: 0.01538
epssPercentile: 0.74405
ingestedAt: '2026-10-15T18:23:58.395Z'
---

## Overview

Directory traversal vulnerability in ZZIPlib 0.13.69 allows attackers to overwrite arbitrary files via a .. (dot dot) in a zip file, because of the function unzzip_cat in the bins/unzzipcat-mem.c file.

## Affected

- `zziplib = 0.13.69`

## Remediation

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