CVE-2018-6459

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.

Published: 2018-02-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-6459 is rated Low Risk (36.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.23%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-6459

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.30% 0.23% -0.07%
2 2025-03-29 0.23% 0.30% +0.07%
3 2025-03-19 — 0.23% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-6459

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-6459

OS Trackers for CVE-2018-6459

vendor priority summary link
debian not yet assigned CVE-2018-6459 not yet assigned priority: Debian including 1 source packages (strongswan), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-6459
gentoo normal CVE-2018-6459: 1 GLSA(s) (201811-16), 1 atom(s) (net-vpn/strongswan); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-6459
redhat medium — https://access.redhat.com/security/cve/CVE-2018-6459
suse high CVE-2018-6459 severity important: SUSE including 66 source package names (strongswan, strongswan-5.8.2-11.8.4, …), 68 product×package rows across 16 product lines (SUSE Linux Enterprise Module for Basesystem 15 SP1, SUSE Linux Enterprise Module for Basesystem 15 SP2, … (16 product lines)): Fixed 61, Known Not Affected 7. https://www.suse.com/security/cve/CVE-2018-6459/
ubuntu medium CVE-2018-6459 medium priority: Ubuntu including 1 source packages (strongswan), 4 status rows across 4 suites (artful, trusty, upstream, xenial): not-affected 3, released 1. https://ubuntu.com/security/CVE-2018-6459

Affected software / configurations for CVE-2018-6459

Vendor Product Version Raw CPE
strongswan strongswan 5.6.1 cpe:2.3:a:strongswan:strongswan:5.6.1:*:*:*:*:*:*:*

References for CVE-2018-6459

cvelogic Threat Intelligence