// For flags

CVE-2019-12312

libreswan: null-pointer dereference by sending two IKEv2 packets

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normallly expected IKE_AUTH exchange. This affects send_v2N_spi_response_from_state() in programs/pluto/ikev2_send.c that will then trigger a NULL pointer dereference leading to a restart of libreswan.

En Libreswan versión anterior a 3.28, un fallo de aserción puede llevar a un reinicio del componente pluto IKE daemon. Un atacante puede iniciar una desreferencia de puntero NULL enviando dos paquetes IKEv2 (init_IKE y delete_IKE) en modo 3des_cbc a un servidor Libreswan. Esto afecta a send_v2N_spi_response_from_state en pprograms/pluto/ikev2_send.c cuando se crea con Network Security Services (NSS).

*Credits: N/A
CVSS Scores
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
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
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
  • 2019-05-24 CVE Reserved
  • 2019-05-24 CVE Published
  • 2024-05-17 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-476: NULL Pointer Dereference
  • CWE-617: Reachable Assertion
CAPEC
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"
 < 3.28
Search vendor "Libreswan" for product "Libreswan" and version " < 3.28"
-
Affected