HIGH
strongswan: Missing initialization of a variable in IKEv2 key derivation allows denial of service
Published Jun 19, 2018
7.5
HIGHCVSS 3.1
EPSS 6.20%
Description
strongSwan 5.6.0 and older allows Remote Denial of Service because of Missing Initialization of a Variable.
Affected products
No data.
Configuration 1
- ≥ 5.0.1 · < 5.6.3
Configuration 2
OR
- 8.0
- 9.0
Configuration 3
OR
- 14.04
- 16.04
- 18.04
Configuration 4
- 28
No data.
Red Hat Enterprise Linux 7
strongimcv
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | strongimcv | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of strongimcv as shipped with Red Hat Enterprise Linux 7 as they did not include support for IKE features.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
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
5.9 MEDIUM Red Hat
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
6.20% 0.06201
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.06201
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (29 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 6.20% (0.06201) | 93.31th | v5 (v2026.06.15) |
| Jul 25, 2026 | 6.20% (0.06201) | 92.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.41% (0.07410) | 93.63th | v5 (v2026.06.15) |
| May 27, 2026 | 13.65% (0.13646) | 94.35th | v4 (v2025.03.14) |
| Mar 23, 2026 | 5.17% (0.05172) | 89.82th | v4 (v2025.03.14) |
| Dec 28, 2025 | 16.95% (0.16951) | 94.75th | v4 (v2025.03.14) |
| Dec 27, 2025 | 18.80% (0.18798) | 95.10th | v4 (v2025.03.14) |
| Nov 21, 2025 | 16.95% (0.16951) | 94.70th | v4 (v2025.03.14) |
| Nov 18, 2025 | 15.14% (0.15144) | 93.99th | v4 (v2025.03.14) |
| Oct 28, 2025 | 16.95% (0.16951) | 94.68th | v4 (v2025.03.14) |
| Oct 27, 2025 | 18.80% (0.18798) | 95.02th | v4 (v2025.03.14) |
| Oct 1, 2025 | 16.95% (0.16951) | 94.76th | v4 (v2025.03.14) |
| Jul 11, 2025 | 18.80% (0.18798) | 94.98th | v4 (v2025.03.14) |
| Mar 17, 2025 | 15.95% (0.15946) | 94.26th | v4 (v2025.03.14) |
| Dec 17, 2024 | 6.82% (0.06824) | 93.81th | v3 (v2023.03.01) |
| Jan 13, 2024 | 8.80% (0.08800) | 93.95th | v3 (v2023.03.01) |
| Nov 10, 2023 | 6.97% (0.06969) | 93.23th | v3 (v2023.03.01) |
| Nov 8, 2023 | 9.54% (0.09539) | 94.15th | v3 (v2023.03.01) |
| Jul 8, 2023 | 7.71% (0.07709) | 93.27th | v3 (v2023.03.01) |
| Jun 13, 2023 | 6.00% (0.05996) | 92.39th | v3 (v2023.03.01) |
| May 8, 2023 | 6.42% (0.06421) | 92.56th | v3 (v2023.03.01) |
| Mar 7, 2023 | 8.24% (0.08243) | 93.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.21% (0.03209) | 66.48th | v1 |
| Jan 6, 2022 | 3.21% (0.03209) | 66.16th | v1 |
| Sep 1, 2021 | 3.21% (0.03209) | 81.46th | v1 |
| Apr 14, 2021 | 3.21% (0.03209) | 0.00th | v1 |
References (14)
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00077.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00001.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00047.html vendor-advisoryx_refsource_SUSEBroken Link
- https://access.redhat.com/security/cve/CVE-2018-10811 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1585966 Issue Tracking
- https://download.strongswan.org/security/CVE-2018-10811/ x_refsource_CONFIRMPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBO6ZQKLB5RY3TV7MXADFTQKXA2LUEIL/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2018-10811
- https://security.gentoo.org/glsa/201811-16 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3771-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-10811
- https://www.debian.org/security/2018/dsa-4229 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.strongswan.org/blog/2018/05/28/strongswan-vulnerability-%28cve-2018-10811%29.html x_refsource_CONFIRM
- https://www.strongswan.org/blog/2018/05/28/strongswan-vulnerability-(cve-2018-10811).html
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 19, 2018
Updated Aug 5, 2024
Reserved May 8, 2018
Link CVE-2018-10811
CISA Vulnrichment
Updated n/a