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CVE-2017-5940

8.8 · HIGH

Firejail before 0.9.44.6 and 0.9.38.x LTS before 0.9.38.10 LTS does not comprehensively address dotfile cases during its attempt to prevent accessing user files with an euid of zero, which allows l…

Published Feb 9, 2017CWE-269EPSS 0.36%

Overview

CVE-2017-5940 is a high-severity vulnerability. It was published on February 9, 2017 and has a CVSS 3.0 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

Firejail before 0.9.44.6 and 0.9.38.x LTS before 0.9.38.10 LTS does not comprehensively address dotfile cases during its attempt to prevent accessing user files with an euid of zero, which allows local users to conduct sandbox-escape attacks via vectors involving a symlink and the --private option. NOTE: this vulnerability exists because of an incomplete fix for CVE-2017-5180.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2017/01/31/16Refwww.securityfocus.com/bid/96221Reffirejail.wordpress.com/download-2/release-notes/GitHubgithub.com/netblue30/firejail/commit/38d418505e9ee2d326557e5639e8da49c298858fGitHubgithub.com/netblue30/firejail/commit/903fd8a0789ca3cc3c21d84cd0282481515592efGitHubgithub.com/netblue30/firejail/commit/b8a4ff9775318ca5e679183884a6a63f3da8f863Refsecurity.gentoo.org/glsa/201702-03Refwww.openwall.com/lists/oss-security/2017/01/31/16Refwww.securityfocus.com/bid/96221Reffirejail.wordpress.com/download-2/release-notes/

How CyberStrike helps

Frequently asked questions

What is CVE-2017-5940?

CVE-2017-5940 is a high-severity vulnerability. It was published on February 9, 2017 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2017-5940?

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-5940?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-5940?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-5940 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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