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CVE-2019-12312

Date: May 24, 2019

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.

Language: C

Severity Score

Related Resources (11)

https://github.com/libreswan/libreswan/compare/9b1394e...3897683
https://access.redhat.com/security/cve/CVE-2019-12312
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-12312
https://nvd.nist.gov/vuln/detail/CVE-2019-12312
https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt
http://www.iwantacve.cn/index.php/archives/218/
https://security.alpinelinux.org/vuln/CVE-2019-12312
https://github.com/libreswan/libreswan/issues/246
https://security-tracker.debian.org/tracker/CVE-2019-12312
https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch
https://www.mend.io/vulnerability-database/CVE-2019-12312

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Reachable Assertion

CWE-617

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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