How severe is CVE-2023-30570?

CVE-2023-30570 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2023-30570 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30570?

CVE-2023-30570 affects Libreswan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30570?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-30570 published?

CVE-2023-30570 was published on 2023-05-29 and last updated on 2026-06-17.

CVE-2023-30570

CVE-2023-30570 is a high-severity vulnerability in Libreswan with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Libreswan
Published: 2023-05-29
Last modified: 2026-06-17

Description

pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.

Frequently asked questions

What is CVE-2023-30570?: pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.
How severe is CVE-2023-30570?: CVE-2023-30570 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2023-30570 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30570?: CVE-2023-30570 affects Libreswan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30570?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-30570 published?: CVE-2023-30570 was published on 2023-05-29 and last updated on 2026-06-17.

References

https://libreswan.org/security/CVE-2023-30570/CVE-2023-30570.txt

Affected products (1)

cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*

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