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- Exec_Shield abstract "Exec Shield is a project started at Red Hat, Inc in late 2002 with the aim of reducing the risk of worm or other automated remote attacks on Linux systems. The first result of the project was a security patch for the Linux kernel that emulates an NX bit on x86 CPUs that lack a native NX implementation in hardware. While the Exec Shield project has had many other components, some people refer to this first patch as Exec Shield.The first Exec Shield patch attempts to flag data memory as non-executable and program memory as non-writeable. This suppresses many security exploits, such as those stemming from buffer overflows and other techniques relying on overwriting data and inserting code into those structures. Exec Shield also supplies some address space layout randomization for the mmap and heap base.The patch additionally increases the difficulty of inserting and executing shellcode, rendering most exploits ineffective. No application recompilation is necessary to fully utilize exec-shield, although some applications (Mono, Wine, XEmacs, Mplayer) are not fully compatible.Other features that came out of the Exec Shield project were the so-called Position Independent Executables (PIE), the address space randomization patch for Linux kernels, a wide set of glibc internal security checks that make heap and format string exploits near impossible, the GCC Fortify Source feature, and the port and merge of the GCC stack-protector feature.".
- Exec_Shield wikiPageExternalLink exec-shield.
- Exec_Shield wikiPageExternalLink ANNOUNCE-exec-shield.
- Exec_Shield wikiPageExternalLink 107.
- Exec_Shield wikiPageExternalLink 1914223.shtml?tid=23.
- Exec_Shield wikiPageExternalLink execshield.
- Exec_Shield wikiPageID "841665".
- Exec_Shield wikiPageRevisionID "603142776".
- Exec_Shield hasPhotoCollection Exec_Shield.
- Exec_Shield subject Category:Linux.
- Exec_Shield subject Category:Linux_security_software.
- Exec_Shield subject Category:Operating_system_security.
- Exec_Shield comment "Exec Shield is a project started at Red Hat, Inc in late 2002 with the aim of reducing the risk of worm or other automated remote attacks on Linux systems. The first result of the project was a security patch for the Linux kernel that emulates an NX bit on x86 CPUs that lack a native NX implementation in hardware.".
- Exec_Shield label "Exec Shield".
- Exec_Shield label "Exec Shield".
- Exec_Shield label "Exec Shield".
- Exec_Shield label "Exec Shield".
- Exec_Shield label "Exec Shield".
- Exec_Shield sameAs Exec_Shield.
- Exec_Shield sameAs Exec_Shield.
- Exec_Shield sameAs Exec_Shield.
- Exec_Shield sameAs Exec_Shield.
- Exec_Shield sameAs m.03g3_b.
- Exec_Shield sameAs Q3061885.
- Exec_Shield sameAs Q3061885.
- Exec_Shield wasDerivedFrom Exec_Shield?oldid=603142776.
- Exec_Shield isPrimaryTopicOf Exec_Shield.