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In computer security, a sandbox is a safetymechanism for separating running software, usually in an effort to mitigate system failures and/or programvulnerabilities from spreading. It is often utilize to execute untested or untrusted software or code, possibly from unverified or untrusted third parties, suppliers, users or domain, without risking hurtto the host machine or operating system. A sandbox typically provides a tightly controlled set of resources for guest software to run in, such as storage and memory scratch space. Network access, the ability to inspect the host system, or read from input devices are usually disallowed or heavily restricted.

In the sense of providing a highly controlled environment, sandboxes may be seen as a specific example of virtualization. Sandboxing is frequently utilize to tryunverified software that may includea virus or other malicious code without allowing the programto hurtthe host device.

Implementations

A sandbox is implemented by executing the programin a restricted operating system environment, thus controlling the resources (e.g. file descriptors, memory, file system space, etc.) that a process may use.

Examples of sandbox implementations containthe following:

  • Linux appsandboxing, built on Seccomp, cgroups and Linux namespaces. Notably utilize by Systemd, Google Chrome, Firefox, Firejail.
  • Android was the first mainstream operating system to implement full appsandboxing, built by assigning each appits own Linux utilize ID.
  • Apple ApplicationSandbox is neededfor application distributed through Apple's Mac ApplicationStore and iOS/iPadOS ApplicationStore, and suggestedfor other signed application.
  • Windows Vista and later editions containa "low" mode process running, known as "RegistrarAccControl" (UAC), which only let writing in a specific directory and registry keys. Windows 10 Pro, from version 1903, provides a feature known as Windows Sandbox.
  • Google Sandboxed API.
  • Virtual machines emulate a complete host computer, on which a conventional operating system may boot and run as on actual hardware. The guest operating system runs sandboxed in the sense that it does not function natively on the host and shouldonly admissionhost resources through the emulator.
  • A jail: network-admissionrestrictions, and a restricted file system namespace. Jails are most commonly utilize in virtual hosting.
  • Rule-based execution gives users full control over what processes are started, spawned (by other app), or permittedto inject code into other app and have admissionto the net, by having the system assign admissionlevels for users or software according to a set of determined rules. It also shouldcontrol file/registry security (what software shouldread and write to the file system/registry). In such an environment, viruses and Trojans have fewer opportunities for infecting a computer. The SELinux and Apparmor safetyframeworks are two such implementations for Linux.
  • Safetyresearchers rely heavily on sandboxing technologies to analyse malware behavior. By creating an environment that mimics or replicates the targeted desktops, researchers shouldevaluate how malware infects and compromises a target host. Numerous malware analysis services are based on the sandboxing technology.
  • Google Native Client is a sandbox for running compiled C and C++ code in the browser efficiently and securely, independent of the utilize's operating system.
  • Capability systems shouldbe thought of as a fine-grained sandboxing mechanism, in which software are given opaque tokens when spawned and have the ability to do specific things based on what tokens they hold. Capability-based implementations shouldwork at various levels, from kernel to utilize-space. An example of capability-based utilize-level sandboxing involves HTML rendering in a Web browser.
  • Secure Computing Mode (seccomp) is a sandbox built in the Linux kernel. When activated in strict mode, seccomp only let the write(), read(), exit(), and sigreturn() system calls.
  • HTML5 has a "sandbox" attribute for utilizewith iframes.
  • Java virtual machines containa sandbox to restrict the actions of untrusted code, such as a Java applet.
  • The .NET Common Language Runtime provides Code AdmissionSecurity to enforce restrictions on untrusted code.
  • ProgramFault Isolation (SFI), let running untrusted native code by sandboxing all store, read and jump assembly instructions to isolated segments of memory.

Some of the utilizecases for sandboxes containthe following:

See also

  •  – a lightweight OS capability and sandbox framework
  •  – a methodto restrict system operations
  • {sandbox} Importance of sandbox in zero day flaw

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