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SELinux

SELinux

Security-Enhanced Linux (SELinux) is a security enhancement to Linux that provides a mechanism for enforcing the security of the system. Under SELinux, programs are run inside a sandbox and follow the principle of least privilege, in which programs are limited to set of necessary operations.

SELinux is an implementation of mandatory access controls (MAC) on Linux. Mandatory access controls allow an administrator of a system to define how applications and users can access different resources such as files, devices, networks and inter-process communication.

With SELinux an administrator can differentiate a user from the applications a user runs.

 SELinux

Price
Free to download

Size
Various packages
License

GNU GPL

Developer
Initial developer:United States National Security Agency; many other contributors

Website
userspace.selinuxproject.org

System Requirements
Filesystem that supports SELinux (such as ext2, ext3, xfs, and jfs)
Extended attributes enabled in the filesystem
Kernel configured to include the CONFIG_AUDIT, SELinux options

Support:
Wiki, FAQ, Mailing Lists, SELinux Notebook

Selected Reviews:

Features include:

  • Uses multiple security models
  • Clean separation of policy from enforcement
  • Type enforcement to enforce mandatory access control
  • Well-defined policy interfaces
  • Support for applications querying the policy and enforcing access control (for example, crond running jobs in the correct context)
  • Support for on-the-fly sandboxing of applications, including X applications
  • Independent of specific policies and policy languages
  • Independent of specific security label formats and contents
  • Individual labels and controls for kernel objects and services
  • Caching of access decisions for efficiency
  • Support for policy changes
  • Support for MLS/MCS translations
  • Separate measures for protecting system integrity (domain-type) and data confidentiality (multilevel security)
  • Very flexible policy
  • Label substitution
  • Virtual machine labeling
  • Per-service seuser support
  • Persistent dontaudit flag
  • Controls over process initialization and inheritance and program execution
  • Controls over file systems, directories, files, and open file descriptors
  • Controls over sockets, messages, and network interfaces
  • Controls over use of "capabilities"

SELinux in action

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Last Updated Monday, May 26 2014 @ 12:23 PM EDT


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