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CVE-2023-41913

Strongswan remote code execution

9.8 CRITICALEPSS 2.31%
  1. Published7 Dec 2023

Description

strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value that exceeds the internal buffer in charon-tkm's DH proxy. The earliest affected version is 5.3.0. An attack can occur via a crafted IKE_SA_INIT message.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Strongswan≥ 5.3.0 < 5.9.12

Remediation

Fixed in
Strongswan≥ 5.9.12

References

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Frequently asked

Is CVE-2023-41913 being actively exploited?

CVE-2023-41913 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.31%.

How severe is CVE-2023-41913?

CVE-2023-41913 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.31% probability of exploitation.

Which products are affected by CVE-2023-41913?

Affected products include Strongswan.

How do I fix CVE-2023-41913?

Upgrade affected software to a fixed version, for example Strongswan 5.9.12 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-41913 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.