---
id: CVE-2013-4235
title: >-
  shadow: TOCTOU (time-of-check time-of-use) race condition when copying and
  removing directory trees
summary: >-
  shadow: TOCTOU (time-of-check time-of-use) race condition when copying and
  removing directory trees
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-367
vendor: debian
product: shadow
affected:
  - shadow
  - debian_linux = 8.0
  - debian_linux = 9.0
  - debian_linux = 10.0
  - fedora = 16
  - fedora = 17
  - enterprise_linux = 5
  - enterprise_linux = 6.0
published: '2019-12-03'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T07:16:36.180'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2013-4235'
references:
  - url: 'https://access.redhat.com/security/cve/cve-2013-4235'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4235'
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    label: secalert@redhat.com
  - url: 'https://security-tracker.debian.org/tracker/CVE-2013-4235'
    label: secalert@redhat.com
  - url: 'https://security.gentoo.org/glsa/202210-26'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/cve-2013-4235'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4235'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security-tracker.debian.org/tracker/CVE-2013-4235'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202210-26'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2013/cve-2013-4235.json
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=884658'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2013-4235'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2013-4235'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00305
epssPercentile: 0.2159
ingestedAt: '2026-10-14T07:21:04.824Z'
scores:
  nvd: 4.7
  vendor: 4.4
---

## Overview

shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees

## Affected

- `shadow`
- `debian_linux = 8.0`
- `debian_linux = 9.0`
- `debian_linux = 10.0`
- `fedora = 16`
- `fedora = 17`
- `enterprise_linux = 5`
- `enterprise_linux = 6.0`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6 · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2013/cve-2013-4235.json)