How severe is CVE-2013-4564?

CVE-2013-4564 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2013-4564 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4564?

CVE-2013-4564 affects Libreswan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-4564?

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

When was CVE-2013-4564 published?

CVE-2013-4564 was published on 2014-01-07 and last updated on 2026-06-16.

CVE-2013-4564

CVE-2013-4564 is a medium-severity vulnerability in Libreswan with a CVSS 2.0 base score of 5.0. 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-189.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Libreswan
Published: 2014-01-07
Last modified: 2026-06-16

Description

Libreswan 3.6 allows remote attackers to cause a denial of service (crash) via a small length value and (1) no version or (2) an invalid major number in an IKE packet.

Frequently asked questions

What is CVE-2013-4564?: Libreswan 3.6 allows remote attackers to cause a denial of service (crash) via a small length value and (1) no version or (2) an invalid major number in an IKE packet.
How severe is CVE-2013-4564?: CVE-2013-4564 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2013-4564 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4564?: CVE-2013-4564 affects Libreswan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-4564?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4564 published?: CVE-2013-4564 was published on 2014-01-07 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:libreswan:libreswan:3.6:*:*:*:*:*:*:*

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CVE-2015-3864 — Critical (CVSS 10.0): Integer underflow in the MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in mediaserver in…
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CVE-2015-3834 — Critical (CVSS 10.0): Multiple integer overflows in the BnHDCP::onTransact function in media/libmedia/IHDCP.cpp in libstagefright in Android…

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