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CVE-2018-10811

27
FAUCET Score

CVE-2018-10811 is a remote denial-of-service vulnerability affecting strongSwan versions 5.6.0 and older, as well as distributions like Canonical, Debian, and Fedora. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, allowing an unauthenticated attacker to cause a complete loss of availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0.1, < 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:*:*:*:esm:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.20%
Probability of exploitation in next 30 days
EPSS Percentile
92.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0620 is in the 88th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2018-10811Moderate

strongswan: Missing initialization of a variable in IKEv2 key derivation allows denial of service

May 28, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-11/msg00077.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2019-12/msg00001.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2020-03/msg00047.html
Broken Link
download.strongswan.org / security/CVE-2018-10811
PatchVendor Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/UBO6ZQKLB5RY3TV7MXADFTQKXA2LUEIL
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
strongswan.org / blog/2018/05/28/strongswan-vulnerability-%28cve-2018-10811%29.html