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CVE-2018-5389

Published: 6 September 2018

The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or brute force attacks. Reusing a key pair across different versions and modes of IKE could lead to cross-protocol authentication bypasses. It is well known, that the aggressive mode of IKEv1 PSK is vulnerable to offline dictionary or brute force attacks. For the main mode, however, only an online attack against PSK authentication was thought to be feasible. This vulnerability could allow an attacker to recover a weak Pre-Shared Key or enable the impersonation of a victim host or network.

Notes

AuthorNote
ebarretto
vulnerability in IKEv1 protocol, not fixable in implementation
use strong passphrase or public-key cryptography
Priority

Low

CVSS 3 base score: 5.9

Status

Package Release Status
ipsec-tools
Launchpad, Ubuntu, Debian
bionic Ignored

cosmic Ignored
(reached end-of-life)
disco Ignored
(reached end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Ignored
(end of ESM support, was needs-triage)
trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Needs triage

isakmpd
Launchpad, Ubuntu, Debian
bionic Ignored

cosmic Ignored
(reached end-of-life)
disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Ignored

groovy Ignored
(reached end-of-life)
hirsute Ignored

impish Ignored

jammy Ignored

precise Does not exist

trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Needs triage

libreswan
Launchpad, Ubuntu, Debian
bionic Ignored

cosmic Ignored
(reached end-of-life)
disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Ignored

groovy Ignored
(reached end-of-life)
hirsute Ignored

impish Ignored

jammy Ignored

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

strongswan
Launchpad, Ubuntu, Debian
bionic Ignored

cosmic Ignored
(reached end-of-life)
disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Ignored

groovy Ignored
(reached end-of-life)
hirsute Ignored

impish Ignored

jammy Ignored

precise Does not exist

trusty Ignored

upstream Needs triage

xenial Ignored