CVE-2018-1000544

Name: CVE-2018-1000544
Creator: NVD / NIST
Published: 2018-06-26T16:29:02.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.50%

Last modified Jun 17, 2026

CVE-2018-1000544 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. rubyzip gem rubyzip version 1.2.1 and earlier contains a Directory Traversal vulnerability in Zip::File component that can result in write arbitrary files to the filesystem. This attack appear to be exploitable via If a site allows uploading of .zip files , an attacker can upload a malicious file that contains symlinks or files with absolute pathnames "../" to write arbitrary files to the filesystem... EPSS estimates a 4.50% chance of exploitation in the next 30 days.

Description

rubyzip gem rubyzip version 1.2.1 and earlier contains a Directory Traversal vulnerability in Zip::File component that can result in write arbitrary files to the filesystem. This attack appear to be exploitable via If a site allows uploading of .zip files , an attacker can upload a malicious file that contains symlinks or files with absolute pathnames "../" to write arbitrary files to the filesystem..

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.50%

90.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rubyzip Project	Rubyzip	<= 1.2.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Redhat	Cloudforms	4.6

References

https://access.redhat.com/errata/RHSA-2018:3466Third Party Advisory
https://github.com/rubyzip/rubyzip/issues/369Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00013.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00002.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3466Third Party Advisory
https://github.com/rubyzip/rubyzip/issues/369Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00013.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00002.htmlMailing List, Third Party Advisory

Timeline

Published: Jun 26, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1000544?

How severe is CVE-2018-1000544?

CVE-2018-1000544 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.50% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000544?

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-2018-1000544?

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

Scan your code now

Source: NVD / NIST