CVE-2018-12520

Name: CVE-2018-12520
Creator: NVD / NIST
Published: 2018-07-05T20:29:00.527+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 10.67%

Last modified Jun 17, 2026

CVE-2018-12520 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 10.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

10.67%

95.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-335

Affected Software

Vendor	Product	Versions
Ntop	Ntopng	>= 3.4, < 3.4.180617

References

http://seclists.org/fulldisclosure/2018/Jul/14Exploit, Mailing List, Third Party Advisory
https://gist.github.com/Psychotropos/3e8c047cada9b1fb716e6a014a428b7fExploit
https://github.com/ntop/ntopng/commit/30610bda60cbfc058f90a1c0a17d0e8f4516221aPatch
https://www.exploit-db.com/exploits/44973/Exploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2018/Jul/14Exploit, Mailing List, Third Party Advisory
https://gist.github.com/Psychotropos/3e8c047cada9b1fb716e6a014a428b7fExploit
https://github.com/ntop/ntopng/commit/30610bda60cbfc058f90a1c0a17d0e8f4516221aPatch
https://www.exploit-db.com/exploits/44973/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Jul 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-12520?

How severe is CVE-2018-12520?

CVE-2018-12520 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 10.67% probability of exploitation in the next 30 days.

How do I fix CVE-2018-12520?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12520?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST