{"cve":"CVE-2018-12520","nvd":{"published":"2018-07-05T20:29:00.527","modified":"2026-06-17T01:37:53.913","status":"Modified","description":"An issue was discovered in ntopng 3.4 before 3.4.180617. The PRNG involved in the generation of session IDs is not seeded at program startup. This results in deterministic session IDs being allocated for active user sessions. An attacker with foreknowledge of the operating system and standard library in use by the host running the service and the username of the user whose session they're targeting can abuse the deterministic random number generation in order to hijack the user's session, thus escalating their access.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-335"],"references":["http://seclists.org/fulldisclosure/2018/Jul/14","https://gist.github.com/Psychotropos/3e8c047cada9b1fb716e6a014a428b7f","https://github.com/ntop/ntopng/commit/30610bda60cbfc058f90a1c0a17d0e8f4516221a","https://www.exploit-db.com/exploits/44973/","http://seclists.org/fulldisclosure/2018/Jul/14"],"products":["ntop:ntopng"],"source":"nvd","synced_at":"2026-10-19T20:51:47.459859389+00:00"},"epss":{"cve":"CVE-2018-12520","score":0.10542,"percentile":0.95772,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}