Home/CVE/strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value
CVE

CVE-2023-41913

strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value

strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value that exceeds the internal buffer in charon-tkm's DH proxy. The earliest affected version is 5.3.0. An attack can occur via a crafted IKE_SA_INIT message.

CRITICAL · CVSS 9.8 EPSS 0.05456
Schedule remediation
  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

1
strongswan>= 5.3.0 and < 5.9.12
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Dec 2023 · 05:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

7
usnUSN-6488-2
msrcCVE-2023-41913
suse-csafSUSE-SU-2023:4529-1
suse-csafSUSE-SU-2023:4514-1
suse-csafSUSE-SU-2023:4515-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/strongswan/strongswan/releasesRelease Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YPJZPYHBCRXUQGGKQE6TYH4J4RIJH6HO/
https://www.strongswan.org/blog/2023/11/20/strongswan-vulnerability-%28cve-2023-41913%29.htmlVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00018.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YPJZPYHBCRXUQGGKQE6TYH4J4RIJH6HO/
https://security.netapp.com/advisory/ntap-20250117-0003/
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