NULL Pointer Dereference Affecting libreswan package, versions <0:3.29-6.el8
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-RHEL8-LIBRESWAN-3601200
- published26 Jul 2021
- disclosed12 May 2019
Introduced: 12 May 2019
CVE-2019-12312 (opens in a new tab)How to fix?
Upgrade RHEL:8 libreswan to version 0:3.29-6.el8 or higher.
This issue was patched in RHSA-2019:3391.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libreswan package and not the libreswan package as distributed by RHEL.
See How to fix? for RHEL:8 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://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://access.redhat.com/security/cve/CVE-2019-12312
- https://github.com/libreswan/libreswan/compare/9b1394e...3897683
- https://github.com/libreswan/libreswan/issues/246
- http://www.iwantacve.cn/index.php/archives/218/
- https://access.redhat.com/errata/RHSA-2019:3391