CVE-2018-12520 Weak cryptography in n/a

High 8.1 Published 5 Jul 2018 Updated 5 Aug 2024

Attackers can hijack user sessions and escalate privileges due to deterministic session ID generation in ntopng.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-12520?

CVE-2018-12520 is a high-severity vulnerability in n/a, published on 5 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-335

Which versions are affected by CVE-2018-12520?

It affects 1 product.

Products include Ntop Ntopng.

How do I fix CVE-2018-12520?

Upgrade to a fixed version.

Is CVE-2018-12520 being exploited?

There is no known exploitation of CVE-2018-12520 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as GHSA-mx87-47cg-9wpg, UBUNTU-CVE-2018-12520, USN-4842-1.