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 exh…

Published 8 y ago 2018-05-31 · modified 4 mo ago 2026-06-17 · JSON

CVSS

6.5

v3.0 · NVD

CISA KEV

not known exploited

EPSS

3.9%

percentile 90%

Public exploits

none known

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.

Exploit prediction (EPSS)

3.92% probability of exploitation in the next 30 days, higher than 90% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	6.5	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`
NVD	2.0	4.0	`AV:N/AC:L/Au:S/C:N/I:N/A:P`

Affected products

strongSwan strongSwan

Classification

Weakness

CWE-124 Buffer Underwrite
CWE-787 Out-of-bounds Write

References

kb.cert.org /vuls/id/338343 · third-party-advisory, x_transferred
security.gentoo.org /glsa/201811-16 · vendor-advisory, x_transferred
git.strongswan.org /?p=strongswan.git%3Ba=commitdiff%3Bh=0acd1ab4 · x_transferred
securityfocus.com /bid/104263 · vdb-entry, x_transferred
usn.ubuntu.com /3771-1/ · vendor-advisory, x_transferred
debian.org /security/2018/dsa-4229 · vendor-advisory, x_transferred
lists.opensuse.org /opensuse-security-announce/2019-11/msg00077.html · vendor-advisory, x_transferred
lists.opensuse.org /opensuse-security-announce/2019-12/msg00001.html · vendor-advisory, x_transferred
lists.opensuse.org /opensuse-security-announce/2020-03/msg00047.html · vendor-advisory, x_transferred
packetstormsecurity.com /files/172833/strongSwan-VPN-Charon-Server-Buffer-Overflow.html · x_transferred

Sources

CVE List: CVE-2018-5388
NVD: CVE-2018-5388

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