Privilege escalation in Firejail Project
CVE-2017-5940
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (27.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/netblue30/firejail/commit/b8a4ff9775318ca5e679183884a6a63f3da8f863 (Patch, Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/201702-03 (vendor-advisory, Third Party Advisory)
- github.com/netblue30/firejail/commit/38d418505e9ee2d326557e5639e8da49c298858f (Patch, Third Party Advisory, Issue Tracking)
- firejail.wordpress.com/download-2/release-notes/ (Release Notes, Vendor Advisory)
- www.openwall.com/lists/oss-security/2017/01/31/16 (Patch, Mailing List, Third Party Advisory)
- github.com/netblue30/firejail/commit/903fd8a0789ca3cc3c21d84cd0282481515592ef (Patch, Third Party Advisory, Issue Tracking)
- www.securityfocus.com/bid/96221 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-5940?
- CVE-2017-5940 is a high-severity vulnerability in Firejail Project, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2017-02-09.
- How severe is CVE-2017-5940?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2017-5940 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.