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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| the libreswan Project | libreswan | 3.29 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | strongswan | 5.1.0-1 | — |
| Debian 13 | libreswan | 3.27-6 | — |
| Debian 13 | strongswan | 5.1.0-1 | — |
| Debian 12 | libreswan | 3.27-6 | — |
| Debian 12 | strongswan | 5.1.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libreswan | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | libreswan | 3.29-6.el8 | RHSA-2019:3391 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libreswan | 3.29-r0 | — |
| Alpine v3.23 | libreswan | 3.29-r0 | — |
| Alpine v3.22 | libreswan | 3.29-r0 | — |
| Alpine v3.21 | libreswan | 3.29-r0 | — |
| Alpine v3.20 | libreswan | 3.29-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libreswan | 3.29-r0 | — |
| Alpine v3.18 | libreswan | 3.29-r0 | — |
| Alpine v3.17 | libreswan | 3.29-r0 | — |
| Alpine v3.16 | libreswan | 3.29-r0 | — |
| Alpine v3.15 | libreswan | 3.29-r0 | — |
| Alpine v3.14 | libreswan | 3.29-r0 | — |
| Alpine v3.13 | libreswan | 3.29-r0 | — |
| Alpine v3.12 | libreswan | 3.29-r0 | — |
| Alpine v3.11 | libreswan | 3.29-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | libreswan | 3.29-6.0.1.el8 | ELSA-2019-3391 |
Advisories 2
- RHSA-2019:3391 Red Hat Security Advisory: libreswan security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- ELSA-2019-3391 Low: libreswan security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 14, 2019
References
- https://libreswan.org/security/CVE-2019-10155/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10155
- FEDORA-2019-f7fb531958 vendor-advisory
- FEDORA-2019-1bd9cfb718 vendor-advisory
- RHSA-2019:3391 vendor-advisory