What is CVE-2019-12312?

CVE-2019-12312 is a vulnerability in Libreswan 3.27 that can lead to a pluto IKE daemon restart.

What is the severity of CVE-2019-12312?

The severity of CVE-2019-12312 is 7.5 (High).

How can an attacker exploit CVE-2019-12312?

An attacker can exploit CVE-2019-12312 by triggering a NULL pointer dereference through the specific sequence of IKEv2 exchanges.

Is there a fix for CVE-2019-12312?

Yes, upgrading to Libreswan version 3.28 or later fixes CVE-2019-12312.

Vulnerability/
CVE-2019-12312

high

7.5

CWE

476 617

24/5/2019

4/8/2024

CVE-2019-12312: Null Pointer Dereference

Q: How does CVE-2019-12312 occur?

CVE-2019-12312 occurs when an attacker initiates an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normally expected IKE_AUTH exchange.

First published: Fri May 24 2019(Updated: )

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.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Libreswan Libreswan	<3.28

Remedy

https://github.com/libreswan/libreswan/compare/9b1394e...3897683

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Reference Links

Frequently Asked Questions

What is CVE-2019-12312?
CVE-2019-12312 is a vulnerability in Libreswan 3.27 that can lead to a pluto IKE daemon restart.
How does CVE-2019-12312 occur?
CVE-2019-12312 occurs when an attacker initiates an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normally expected IKE_AUTH exchange.
What is the severity of CVE-2019-12312?
The severity of CVE-2019-12312 is 7.5 (High).
How can an attacker exploit CVE-2019-12312?
An attacker can exploit CVE-2019-12312 by triggering a NULL pointer dereference through the specific sequence of IKEv2 exchanges.
Is there a fix for CVE-2019-12312?
Yes, upgrading to Libreswan version 3.28 or later fixes CVE-2019-12312.

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