CVE-2019-12312

Name	CVE-2019-12312
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	929916

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libreswan (PTS)	bullseye	4.3-1+deb11u4	fixed
	bullseye (security)	4.3-1+deb11u3	fixed
	bookworm	4.10-2+deb12u1	fixed
	sid, trixie	4.14-1.1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libreswan	source	experimental	3.28-1
libreswan	source	(unstable)	3.27-5			929916

Notes

https://github.com/libreswan/libreswan/issues/246
https://github.com/libreswan/libreswan/commit/7142d2c37d58cf024595a7549f0fb0d3946682f8
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