CVE-2019-12312 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://www.iwantacve.cn/index.php/archives/218/ https://github.com/libreswan/libreswan/compare/9b1394e…3897683 https://github.com/libreswan/libreswan/issues/246 https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5