CVE-2018-5388

What it is

In stroke_socket.c in strongSwan before 5.6.3, a missing packet length check could allow a buffer underflow, which may lead to resource exhaustion and denial of service while reading from the socket.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of service disruption.

Exploit odds

3.9% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2018-05-31 13:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:00 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.9% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2018-05-31 13:29 UTC

Last modified

2026-06-17 02:00 UTC

Exploit probability

3.9% · EPSS, next 30 days

Weakness

CWE-124

Record status

Modified

Affected

• Strongswan < 5.6.3
• Debian Linux 8.0
• Debian Linux 9.0
• Canonical Ubuntu Linux 14.04
• Canonical Ubuntu Linux 16.04
• Canonical Ubuntu Linux 18.04

Attack profile CVSS 3.0 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-5388.md and follow it. Check whether this project is affected by CVE-2018-5388. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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