Strongswan: >> Strongswan Security Vulnerabilities
libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.
CVSS Score
5.6
EPSS Score
0.003
Published
2026-09-11
strongSwan 4.6.2 through 6.0.7 has an infinite loop in PKCS#5 decryption.
CVSS Score
5.9
EPSS Score
0.004
Published
2026-09-11
strongSwan 4.2.0 through 6.0.7 has a missing release of memory after its effective lifetime in the x509 plugin's attribute certificate parser.
CVSS Score
3.7
EPSS Score
0.002
Published
2026-09-11
strongSwan 5.1.3 through 6.0.7 has an infinite loop in the x509 plugin's attribute certificate parser for ietfAttrSyntax.
CVSS Score
7.5
EPSS Score
0.003
Published
2026-09-11
strongSwan 4.5.0 through 6.0.7 has Incorrect Access Control in the eap-ttls and eap-peap plugins because there can be a missing or mismatched inner EAP identity.
CVSS Score
7.1
EPSS Score
0.003
Published
2026-09-11
strongSwan 4.2.0 through 6.0.7 has a NULL pointer dereference in the x509 plugin's attribute certificate parser.
CVSS Score
7.5
EPSS Score
0.003
Published
2026-09-11
strongSwan 5.0.2 through 6.0.7 allows PKCS#7 certificate enumeration in the openssl plugin that leads to a lack of release of memory after its effective lifetime.
CVSS Score
3.7
EPSS Score
0.002
Published
2026-09-11
strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin.
CVSS Score
5.9
EPSS Score
0.004
Published
2026-09-11
strongSwan versions 5.9.2 through 5.9.5 are affected by authorization bypass through improper validation of certificate with host mismatch (CWE-297). When certificates are used to authenticate clients in TLS-based EAP methods, the IKE or EAP identity supplied by a client is not enforced to be contained in the client's certificate. So clients can authenticate with any trusted certificate and claim an arbitrary IKE/EAP identity as their own. This is problematic if the identity is used to make policy decisions. A fix was released in strongSwan version 5.9.6 in August 2022 (e4b4aabc4996fc61c37deab7858d07bc4d220136).
CVSS Score
7.7
EPSS Score
0.005
Published
2024-05-14
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.
CVSS Score
9.8
EPSS Score
0.023
Published
2023-12-07
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