CVE-2018-5389 CVE-2018-5389
Attackers can recover weak Pre-Shared Keys or impersonate hosts via offline brute-force attacks against IKEv1 main mode.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-5389?
CVE-2018-5389 is a medium-severity vulnerability in Strongswan, published on 6 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-521
Which versions are affected by CVE-2018-5389?
It affects 1 product.
Products include Ietf Internet Key Exchange.
How do I fix CVE-2018-5389?
No fix has been published for CVE-2018-5389 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-5389 being exploited?
There is no known exploitation of CVE-2018-5389 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2018-5389, GHSA-999m-cq5c-hqgx, UBUNTU-CVE-2018-5389.