NULL Pointer Dereference Affecting libreswan package, versions <3.27-5
Threat Intelligence
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Start learning- Snyk IDSNYK-DEBIAN13-LIBRESWAN-5685227
- published24 May 2019
- disclosed24 May 2019
Introduced: 24 May 2019
CVE-2019-12312 (opens in a new tab)How to fix?
Upgrade Debian:13 libreswan to version 3.27-5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libreswan package and not the libreswan package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
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.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12312
- https://security-tracker.debian.org/tracker/CVE-2019-12312
- 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
- https://github.com/libreswan/libreswan/compare/9b1394e...3897683
- https://github.com/libreswan/libreswan/issues/246
- http://www.iwantacve.cn/index.php/archives/218/