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Vulnerabilities

Vulnerability · CVE-2013-4235

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

Published Dec 3, 2019 · catalog updated Oct 14, 2026 · shadow: TOCTOU (time-of-check time-of-use)

Check if you run it

No confirmed exploitation is on record for CVE-2013-4235. EPSS is 0.31%. Act only if a listed version of shadow: TOCTOU (time-of-check time-of-use) is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (shadow: TOCTOU (time-of-check time-of-use)).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe debian/shadow · cpe fedoraproject/fedora · cpe redhat/enterprise linux · vendor shadow shadow

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux10.0
  • cpe debian/debian linux8.0
  • cpe debian/debian linux9.0
  • cpe debian/shadowversion unspecified
  • cpe fedoraproject/fedora16
  • cpe fedoraproject/fedora17
  • cpe redhat/enterprise linux5
  • cpe redhat/enterprise linux6.0
  • vendor shadow shadowversion unspecified

How to fix CVE-2013-4235

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2013-4235. EPSS is 0.31%. Act only if a listed version of shadow: TOCTOU (time-of-check time-of-use) is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0; debian/debian linux 8.0; debian/debian linux 9.0; redhat/enterprise linux 5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 3, 2019 · NIST NVD

    Detected

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

  2. Oct 14, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2013-4235

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

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2013-4235

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2013-4235

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.