Vulnerability Development mailing list archives
is this a bug ?
From: Guy Cohen <guy () CRYPTO ORG IL>
Date: Sat, 9 Dec 2000 01:52:08 +0200
Hello, first i mast explain i am no programmer, i just read a few documents on the web and try to play with stuff. If this is inappropriate here please tell me and except my apologize. anyhow, i have this asm code: .global id .global end .data id: jmp start doit: popl %esi movl %esi,0x08(%esi) xorl %eax,%eax movb %eax,0x07(%esi) movl %eax,0xc(%esi) movb $0xb,%eax movl %esi,%ebx leal 0x8(%esi),%ecx xorl %edx,%edx int $0x80 start: call doit .string "/bin/idX" end: and the c to run it: extern void id(); extern void end(); main() { id(); } both a ripof from Marc Blumenauer <marc () system-security net> but what strikes me odd is that if i cange any of the length of the string to a wrong lenght (0x09 for example) my cpu get to 98.8 usage % after 5 seconds. (this is run by regular user) Can any one explain/verify this on a computer with more the 133MHz and 48 RAM ? Cheers, Guy
Current thread:
- is this a bug ? Guy Cohen (Dec 09)
- Re: is this a bug ? Jonathan James (Dec 11)
- Re: is this a bug ? BORBELY Zoltan (Dec 15)
- <Possible follow-ups>
- Re: is this a bug ? Robert G. Ferrell (Dec 12)
- Re: is this a bug ? Jonathan James (Dec 11)