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CVE-2018-5388

24
FAUCET Score

CVE-2018-5388 is a buffer underflow vulnerability in strongSwan versions prior to 5.6.3, specifically within the stroke_socket.c component, affecting various distributions of strongSwan on Canonical and Debian Linux. This flaw, rated Medium (CVSS 6.5), can be exploited remotely with low complexity and privileges, leading to resource exhaustion and denial of service. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.6.3CPE matchmatch criteria
cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.02%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0402 is in the 97th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: strongimcv

Vendor Advisories (1)

redhatCVE-2018-5388Moderate

strongswan: integer underflow leads to buffer overflow and denial of service in stroke_socket.c

May 22, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-11/msg00077.html
lists.opensuse.org / opensuse-security-announce/2019-12/msg00001.html
lists.opensuse.org / opensuse-security-announce/2020-03/msg00047.html
packetstormsecurity.com / files/172833/strongSwan-VPN-Charon-Server-Buffer-Overflow.html
git.strongswan.org
security.gentoo.org / glsa/201811-16
Third Party Advisory
usn.ubuntu.com / 3771-1
Third Party Advisory
debian.org / security/2018/dsa-4229
Third Party Advisory
kb.cert.org / vuls/id/338343
Third Party AdvisoryUS Government Resource
securityfocus.com / bid/104263
Third Party AdvisoryVDB Entry