CVE-2018-20835

Name: CVE-2018-20835
Creator: NVD / NIST
Published: 2019-04-30T19:29:03.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.11%

Last modified Jun 17, 2026

CVE-2018-20835 is a vulnerability of currently unknown severity. A vulnerability was found in tar-fs before 1.16.2. An Arbitrary File Overwrite issue exists when extracting a tarball containing a hardlink to a file that already exists on the system, in conjunction with a later plain file with the same name as the hardlink. EPSS estimates a 2.11% chance of exploitation in the next 30 days.

Description

A vulnerability was found in tar-fs before 1.16.2. An Arbitrary File Overwrite issue exists when extracting a tarball containing a hardlink to a file that already exists on the system, in conjunction with a later plain file with the same name as the hardlink. This plain file content replaces the existing file content.

Metrics

EPSS Probability

2.11%

79.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Tar-Fs Project	Tar-Fs	< 1.16.2

References

https://github.com/mafintosh/tar-fs/commit/06672828e6fa29ac8551b1b6f36c852a9a3c58a2Patch, Third Party Advisory
https://github.com/mafintosh/tar-fs/compare/d590fc7...a35ce2fPatch, Third Party Advisory
https://hackerone.com/reports/344595Exploit, Third Party Advisory
https://github.com/mafintosh/tar-fs/commit/06672828e6fa29ac8551b1b6f36c852a9a3c58a2Patch, Third Party Advisory
https://github.com/mafintosh/tar-fs/compare/d590fc7...a35ce2fPatch, Third Party Advisory
https://hackerone.com/reports/344595Exploit, Third Party Advisory

Timeline

Published: Apr 30, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20835?

How severe is CVE-2018-20835?

Severity scoring for CVE-2018-20835 is pending analysis. The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20835?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20835?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST