CVE-2022-23094

libreswan: Malicious IKEv1 packet can cause libreswan to restart

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Libreswan versiones 4.2 hasta 4.5, permite a atacantes remotos causar una denegación de servicio (desreferencia del puntero NULL y bloqueo del demonio) por medio de un paquete IKEv1 diseñado porque el archivo pluto/ikev1.c espera erróneamente que sea presentado un objeto de estado. Esto ha sido corregido en versión 4.6

A vulnerability was found in libreswan. A malformed packet that is being rejected triggers a logging action that causes a NULL pointer dereference issue, leading to a crash of the pluto daemon.

Libreswan is an implementation of IPsec and IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks such as virtual private network.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-01-11 CVE Reserved
2022-01-15 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (7)

URL	Tag	Source
https://libreswan.org/security/CVE-2022-23094	Third Party Advisory

URL	Date	SRC
https://github.com/libreswan/libreswan/issues/585	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPMIHAXWQUJAPCIGNJ5J5Q6ASWQBU7T5	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFZ7WP5LNNBW5ADIOPDSPQ23SXZJRNMP	2023-11-07
https://www.debian.org/security/2022/dsa-5048	2023-11-07
https://access.redhat.com/security/cve/CVE-2022-23094	2022-01-24
https://bugzilla.redhat.com/show_bug.cgi?id=2036898	2022-01-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libreswan Search vendor "Libreswan"		Libreswan Search vendor "Libreswan" for product "Libreswan"				>= 4.2 < 4.6 Search vendor "Libreswan" for product "Libreswan" and version " >= 4.2 < 4.6"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected