CVE-2023-38711

libreswan: Invalid IKEv1 Quick Mode ID causes restart

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

An issue was discovered in Libreswan before 4.12. When an IKEv1 Quick Mode connection configured with ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6.

Se ha descubierto un problema en Libreswan anterior a 4.12. Cuando una conexión de modo rápido IKEv1 configurada con ID_IPV4_ADDR o ID_IPV6_ADDR recibe una carga útil IDcr con ID_FQDN, una desviación de puntero NULL provoca un bloqueo y reinicio del demonio pluto. NOTA: la primera versión afectada es la 4.6.

A NULL pointer dereference flaw was found in Libreswan when processing IKEv1 Quick Mode requests. When an IKEv1 Quick Mode connection configured with ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, it triggers a NULL pointer dereference error. This flaw allows a malicious client or attacker to send a malformed IKEv1 Quick Mode packet, causing a crash and restart of the libreswan pluto daemon. When sent continuously, this issue leads to a denial of service attack.

*Credits: N/A

CVSS Scores

NISTv3.1 6.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-07-24 CVE Reserved
2023-08-25 CVE Published
2024-08-02 CVE Updated
2024-08-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (4)

URL	Tag	Source
https://github.com/libreswan/libreswan/tags	Third Party Advisory
https://libreswan.org/security/CVE-2023-38711	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-38711	2023-11-14
https://bugzilla.redhat.com/show_bug.cgi?id=2215952	2023-11-14

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"				>= 4.6 < 4.12 Search vendor "Libreswan" for product "Libreswan" and version " >= 4.6 < 4.12"		-		Affected