What’s Vulnerable › Vulnerabilities

CVE-2019-10155

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-06-12 · updated 2026-06-17
• Weakness: CWE-354

Description

The Libreswan Project has found a vulnerability in the processing of IKEv1 informational exchange packets which are encrypted and integrity protected using the established IKE SA encryption and integrity keys, but as a receiver, the integrity check value was not verified. This issue affects versions before 3.29.

Affected products

• Fedoraproject Fedora: 29, 30
• The Libreswan Project libreswan: before 3.29 — fixed in 3.29
• Red Hat Enterprise Linux: 8.0
• strongSwan: before 5.0.0 — fixed in 5.0.0
• Xelerance Openswan: all versions

How to fix

Upgrade to a fixed version: The Libreswan Project libreswan 3.29; strongSwan 5.0.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2019:3391
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10155
• https://libreswan.org/security/CVE-2019-10155/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUEXFCN7FAYBKJBQJLYCEUQUCHDEJRZW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LFGPGLLKAXSLWFI62A6BZHTZSCHRCBXS/
• https://access.redhat.com/errata/RHSA-2019:3391
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10155
• https://libreswan.org/security/CVE-2019-10155/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUEXFCN7FAYBKJBQJLYCEUQUCHDEJRZW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LFGPGLLKAXSLWFI62A6BZHTZSCHRCBXS/

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