lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
From: gem at rellim.com (Gary E. Miller) Subject: Re: Administrivia: Testing Emergency Virus Filter.. Yo Drew! On Wed, 20 Aug 2003, Drew Copley wrote: > I don't know how that guy thought that the smtp client portion of this > code was an OS issue... How that is OS design. I don't know why such > people would be offering their opinion on this. The difference is this between and secure OS and an insecure one. On an Insecure OS, the virus gets in. glues itself on anywhere in the machine. Maybe it attaches to a boot sector, maybe appends itself to a system file, edits registry, maybe all the above and a lot more, whatever. User logs out, the virus still runs as admin or root. Some virii even have hooks to turn off personal firewalls in an insecure OS. On a Secure OS, the virus can only write to the (normal) users home directory. Easy to find. Easy to delete. Virus can not write to registry, boot sector, system directories, etc. Then when the user logs out his processes are terminated or he is warned of something still running. So virus does not continue after log out. On a secure OS, the (normal) user can not edit the personal firewall setting so the cirus can not bypas that easily. Very secure OS can add even more restrictions on what a user can do. Like prevent the user from running daemons, bots, etc... The makes a huge difference in how easy it is to be infected, how easy it is to detect infection and how easy to disinfect. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701 gem@...lim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676
Powered by blists - more mailing lists