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SELinux & AppArmor by Ralf Spenneberg

By Ralf Spenneberg

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Example text

Um tatsächlich auch AppArmor zu testen, wurden für die Applikationen jeweils Profile erzeugt, sodass die Benchmark-Applikationen unter der Kontrolle des AppArmorSystems liefen. 1). org/pub/tux/benchmarks/System/unixbench/ open source library 3 Benchmarks Der UNIXbench-Benchmark ergab die folgenden Ergebnisse: Test ohne AppArmor Dhrystone 2 using register variables 343,9 mit AppArmor 345,5 Verlust 0% Double-Precision Whetstone 191,9 192,0 0% Execl Throughput 694,2 477,5 32% File Copy 1024 bufsize 2000 maxblocks 732,7 697,1 5% File Copy 256 bufsize 500 maxblocks File Copy 4096 bufsize 8000 maxblocks 506,4 476,3 6% 1118,9 1050,5 7% Pipe Throughput 445,3 440,7 1% Process Creation 792,8 785,6 1% 1048,3 934,3 11% 390,1 390,3 0% Shell Scripts (8 concurrent) System Call Overhead Die Ergebnisse des LMBench-Benchmarks hier aufzuführen, möchte ich Ihnen ersparen.

Bezüglich der Verwendung dieser Technologie in SELinux hat die Secure Computing Corporation ein Statement veröffentlicht, in welchem sie auf die Anwendung ihrer Rechte in Bezug auf SELinux verzichtet1 . Unabhängig von dieser Tatsache sind die betroffenen Patente inzwischen auch abgelaufen: US4713753 US4621321 US4701840 Veröffentlichung Eingereicht Ablaufdatum 15. Dezember 1987 21. Februar 1985 21. Februar 2005 4. November 1986 20. Oktober 1987 16. Februrar 1984 16. Februar 2004 20. Juni 1986 20.

Es bietet neben den Funktionen eines Role-Based-Mandatory-Access- 46 Control-Systems noch viele weitere Funktionen. Die folgenden Funktionen wurden der grsecurity-Webseite entnommen und sinngemäß übersetzt: Härtung des Chroot Sicherung des /tmp-Verzeichnisses gegen Race Conditions Randomisierung des User-Stacks, der Bibliotheken und des Heap Randomisierung des Kernel-Stacks Einschränkung der Sicht der Benutzer auf ihre Prozesse Protokollierung der IP-Adresse der Benutzer, die die Richtlinien verletzen Achtung Das Projekt grsecurity ist leider nur ein Ein-Mann-Projekt.

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