CVE-2018-6459 Denial of service in n/a

Medium 5.3 Published 20 Feb 2018 Updated 5 Aug 2024

Remote attackers can cause a denial of service in strongSwan by sending a crafted RSASSA-PSS signature lacking a mask generation function parameter.

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

What is CVE-2018-6459?

CVE-2018-6459 is a medium-severity denial of service vulnerability in n/a, published on 20 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The rsa_pss_params_parse function in libstrongswan/credentials/keys/signature_params.c in strongSwan 5.6.1 allows remote attackers to cause a denial of service via a crafted RSASSA-PSS signature that lacks a mask generation function parameter.

Weakness: CWE-347

Which versions are affected by CVE-2018-6459?

It affects 1 product.

Linux distribution packages (2)

`strongswan` SUSE:Linux Enterprise Module for Basesystem 15 SP1	All versions	`5.8.2-4.6.14`
`strongswan` openSUSE:Leap 15.1	All versions	`5.8.2-lp151.4.6.1`

Products include Strongswan Strongswan.

How do I fix CVE-2018-6459?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-6459 being exploited?

There is no known exploitation of CVE-2018-6459 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2018-6459, GHSA-66xj-v6xw-92v4, SUSE-SU-2020:0743-1, openSUSE-SU-2020:0403-1.