CVE-2018-6356: Jenkins before 2.107 and Jenkins LTS before 2.89.4 did not properly prevent specifying relative paths that escape a base directory for URLs accessing ...

Description

Jenkins before 2.107 and Jenkins LTS before 2.89.4 did not properly prevent specifying relative paths that escape a base directory for URLs accessing plugin resource files. This allowed users with Overall/Read permission to download files from the Jenkins master they should not have access to. On Windows, any file accessible to the Jenkins master process could be downloaded. On other operating systems, any file within the Jenkins home directory accessible to the Jenkins master process could be downloaded.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

3.88%

88.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	< 2.107
Jenkins	Jenkins	< 2.89.4
Oracle	Communications Cloud Native Core Automated Test Suite	1.9.0

References

http://www.openwall.com/lists/oss-security/2018/02/14/1Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/103037Broken Link, VDB Entry
https://jenkins.io/security/advisory/2018-02-14/Vendor Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/02/14/1Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/103037Broken Link, VDB Entry
https://jenkins.io/security/advisory/2018-02-14/Vendor Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory

Timeline

Published: Feb 20, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-6356?

Jenkins before 2.107 and Jenkins LTS before 2.89.4 did not properly prevent specifying relative paths that escape a base directory for URLs accessing plugin resource files. This allowed users with Overall/Read permission to download files from the Jenkins master they should not have access to. On Windows, any file accessible to the Jenkins master process could be downloaded. On other operating systems, any file within the Jenkins home directory accessible to the Jenkins master process could be downloaded.

How severe is CVE-2018-6356?

CVE-2018-6356 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.88% probability of exploitation in the next 30 days.

How do I fix CVE-2018-6356?

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.

How Strix Helps

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