What’s Vulnerable › Vulnerabilities

CVE-2018-12520

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-07-05 · updated 2026-06-17
• Weakness: CWE-335

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.

Affected products

• ntopng: from 3.4 before 3.4.180617 — fixed in 3.4.180617

How to fix

Upgrade to a fixed version: ntopng 3.4.180617. Check the vendor advisory for mitigations.

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
• https://gist.github.com/Psychotropos/3e8c047cada9b1fb716e6a014a428b7f
• https://github.com/ntop/ntopng/commit/30610bda60cbfc058f90a1c0a17d0e8f4516221a
• https://www.exploit-db.com/exploits/44973/

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