Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object exists. This is fixed in 4.6.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libreswan | Libreswan | 4.2 (including) | 4.6 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | libreswan-0:4.4-4.el8_5 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | libreswan-0:4.3-6.el8_4 | * |
| Libreswan | Ubuntu | bionic | * |
| Libreswan | Ubuntu | focal | * |
| Libreswan | Ubuntu | hirsute | * |
| Libreswan | Ubuntu | impish | * |
| Libreswan | Ubuntu | kinetic | * |
| Libreswan | Ubuntu | trusty | * |
| Libreswan | Ubuntu | upstream | * |
| Libreswan | Ubuntu | xenial | * |
Potential Mitigations
References
- https://github.com/libreswan/libreswan/issues/585
- https://libreswan.org/security/CVE-2022-23094
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPMIHAXWQUJAPCIGNJ5J5Q6ASWQBU7T5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFZ7WP5LNNBW5ADIOPDSPQ23SXZJRNMP/
- https://www.debian.org/security/2022/dsa-5048
- https://github.com/libreswan/libreswan/issues/585
- https://libreswan.org/security/CVE-2022-23094
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPMIHAXWQUJAPCIGNJ5J5Q6ASWQBU7T5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFZ7WP5LNNBW5ADIOPDSPQ23SXZJRNMP/
- https://www.debian.org/security/2022/dsa-5048