CVE-2019-12312

Name: CVE-2019-12312
Creator: NVD / NIST
Published: 2019-05-24T14:29:00.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.75%

Last modified Jun 17, 2026

CVE-2019-12312 is a vulnerability of currently unknown severity. 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. EPSS estimates a 2.75% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.75%

84.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libreswan	Libreswan	< 3.28

References

http://www.iwantacve.cn/index.php/archives/218/Exploit, Third Party Advisory
https://github.com/libreswan/libreswan/compare/9b1394e...3897683Patch, Third Party Advisory
https://github.com/libreswan/libreswan/issues/246Third Party Advisory
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
http://www.iwantacve.cn/index.php/archives/218/Exploit, Third Party Advisory
https://github.com/libreswan/libreswan/compare/9b1394e...3897683Patch, Third Party Advisory
https://github.com/libreswan/libreswan/issues/246Third Party Advisory
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

Timeline

Published: May 24, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12312?

How severe is CVE-2019-12312?

Severity scoring for CVE-2019-12312 is pending analysis. The EPSS model estimates a 2.75% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12312?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-12312?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST