pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and…
Priority MEDIUM 41CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 12 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-400.
Summary
pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01185 68th percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 12 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:* | 3.28 – 4.10 | Vulnerable | The Libreswan Project |
- cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:* Versions 3.28 – 4.10 Vulnerable ·The Libreswan Project
Remediation
Red Hat 7 advisories
- RHSA-2023:2125 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream EUS (v.8.4) libreswan-4.3-6.el8_4.1
- RHSA-2023:2123 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) libreswan-4.5-1.el8_6.1
- RHSA-2023:2126 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) libreswan-3.29-7.el8_1.2
Show 4 more Red Hat advisories
- RHSA-2023:2122 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream (v. 8) libreswan-4.5-1.el8_7.1
- RHSA-2023:2124 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) libreswan-3.29-7.el8_2.2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) libreswan-3.29-7.el8_2.2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) libreswan-3.29-7.el8_2.2
- RHSA-2023:2121 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream EUS (v.9.0) libreswan-4.6-3.el9_0.1
- RHSA-2023:2120 Released 2023-05-04 · Red Hat rating Importantlibreswan security update
- Red Hat Enterprise Linux AppStream (v. 9) libreswan-4.6-3.el9_1.1
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:2122 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:2120 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2023:2124 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.1) | Fixed | RHSA-2023:2126 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.2) | Fixed | RHSA-2023:2124 |
| Red Hat Enterprise Linux AppStream EUS (v.8.4) | Fixed | RHSA-2023:2125 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2023:2123 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2023:2121 |
| Red Hat Enterprise Linux AppStream TUS (v. 8.2) | Fixed | RHSA-2023:2124 |
| Red Hat OpenShift Container Platform 4.15 | Fixed | — |
| Red Hat OpenShift Container Platform 4.16 | Fixed | — |
| Red Hat OpenShift Container Platform 4.17 | Fixed | — |
Not affected: 2 products
- Red Hat Enterprise Linux 7
- Red Hat OpenShift Container Platform 4.17
Timeline
- 2026-10-02 Threatist record created from CVE-2023-30570
- 2026-10-03 Alias added: GHSA-4h3c-85v5-c6x6
References
More The Libreswan Project Libreswan vulnerabilities
- TI-2023-09114 Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and… CVSS 3.1MEDIUM 6.5
- TI-2013-05949 Race condition in the libreswan.spec files for Red Hat Enterprise Linux (RHEL) and Fedora… CVSS 2.0HIGH 9.3
- TI-2023-02152 Uncontrolled resource consumption in libreswan CVSS 3.1HIGH 7.5
- TI-2026-37395 IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload CVSS 3.1HIGH 8.1
- TI-2026-37394 IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload CVSS 3.1HIGH 8.1
- TI-2026-10657 IKEv2 Denial of Service via malformed fragmentation CVSS 3.1HIGH 7.5
Sources
- CVE-2023-30570 · CVE Program
- CVE-2023-30570 · NVD
- FIRST EPSS
- GHSA-4h3c-85v5-c6x6 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-30570 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences