CVE-2018-12520

Published: 5 July 2018

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.

From the Ubuntu Security Team

It was discovered that ntopng did not properly seed its random number generator, leading to predictable session tokens. An attacker could use this vulnerability to hijack a user's session.

Priority

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package	Release	Status
ntopng Launchpad, Ubuntu, Debian	artful	Ignored (end of life)
	bionic	Released (3.2+dfsg1-1ubuntu0.1~esm2) Available with Ubuntu Pro
	cosmic	Ignored (end of life)
	disco	Not vulnerable (3.8+dfsg1-2.1build1)
	eoan	Not vulnerable (3.8+dfsg1-2.1build1)
	focal	Not vulnerable (3.8+dfsg1-2.1build1)
	groovy	Not vulnerable (3.8+dfsg1-2.1build1)
	hirsute	Not vulnerable (3.8+dfsg1-2.1build1)
	impish	Does not exist
	jammy	Not vulnerable (5.2.1+dfsg1-1)
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Not vulnerable (5.2.1+dfsg1-1)
	mantic	Not vulnerable (5.2.1+dfsg1-1)
	noble	Not vulnerable (5.2.1+dfsg1-1)
	trusty	Does not exist
	upstream	Released (3.8+dfsg1-1)
	xenial	Released (2.2+dfsg1-1ubuntu0.1~esm2) Available with Ubuntu Pro

Severity score breakdown

Parameter	Value
Base score	8.1
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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