CVE-2019-12312

Public Exploit

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.54%
Third-Party Advisory iwantacve.cn Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.iwantacve.cn/index.php/archives/218/ third party advisory exploit
https://github.com/libreswan/libreswan/issues/246 third party advisory
https://github.com/libreswan/libreswan/compare/9b1394e...3897683 third party advisory patch
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

Frequently Asked Questions

What is the severity of CVE-2019-12312?
CVE-2019-12312 has been scored as a high severity vulnerability.
How to fix CVE-2019-12312?
To fix CVE-2019-12312, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12312 being actively exploited in the wild?
It is possible that CVE-2019-12312 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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