Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2019-12589

Incorrect Permission Assignment for Critical Resource

Published: Jun 03, 2019 | Modified: Nov 07, 2023
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.x
4.6 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-12589
CWEhttps://cwe.mitre.org/data/definitions/732.html

In Firejail before 0.9.60, seccomp filters are writable inside the jail, leading to a lack of intended seccomp restrictions for a process that is joined to the jail after a filter has been modified by an attacker.

Weakness

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Software

Name Vendor Start Version End Version
Firejail Firejail_project * 0.9.60 (excluding)
Firejail Ubuntu bionic *
Firejail Ubuntu cosmic *
Firejail Ubuntu devel *
Firejail Ubuntu disco *
Firejail Ubuntu eoan *
Firejail Ubuntu esm-apps/bionic *
Firejail Ubuntu esm-apps/xenial *
Firejail Ubuntu focal *
Firejail Ubuntu groovy *
Firejail Ubuntu hirsute *
Firejail Ubuntu impish *
Firejail Ubuntu jammy *
Firejail Ubuntu kinetic *
Firejail Ubuntu lunar *
Firejail Ubuntu mantic *
Firejail Ubuntu noble *
Firejail Ubuntu oracular *
Firejail Ubuntu trusty *
Firejail Ubuntu upstream *
Firejail Ubuntu xenial *

Potential Mitigations

  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.

References

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