SB2017020927 - Improper Privilege Management in firejail.wordpress.com firejail
Published: February 9, 2017 Updated: August 13, 2020
Security Bulletin ID
SB2017020927
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Privilege Management (CVE-ID: CVE-2017-5940)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to firejail 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.
Remediation
Install update from vendor's website.
References
- http://www.openwall.com/lists/oss-security/2017/01/31/16
- http://www.securityfocus.com/bid/96221
- https://firejail.wordpress.com/download-2/release-notes/
- https://github.com/netblue30/firejail/commit/38d418505e9ee2d326557e5639e8da49c298858f
- https://github.com/netblue30/firejail/commit/903fd8a0789ca3cc3c21d84cd0282481515592ef
- https://github.com/netblue30/firejail/commit/b8a4ff9775318ca5e679183884a6a63f3da8f863
- https://security.gentoo.org/glsa/201702-03