How severe is CVE-2018-6459?

CVE-2018-6459 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2018-6459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6459?

CVE-2018-6459 affects Strongswan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6459?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-6459 published?

CVE-2018-6459 was published on 2018-02-20 and last updated on 2026-06-17.

CVE-2018-6459

CVE-2018-6459 is a medium-severity vulnerability in Strongswan with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Strongswan
Published: 2018-02-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-6459?: CVE-2018-6459 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2018-6459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6459?: CVE-2018-6459 affects Strongswan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-6459 published?: CVE-2018-6459 was published on 2018-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:strongswan:strongswan:5.6.1:*:*:*:*:*:*:*

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