CVE-2019-12312

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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/libreswan/libreswan/issues/246	Third Party Advisory
https://github.com/libreswan/libreswan/compare/9b1394e...3897683	Patch Third Party Advisory
http://www.iwantacve.cn/index.php/archives/218/	Exploit Third Party Advisory
https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch
https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt

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Configurations

Configuration 1 (hide)

cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*

Information

Published : 2019-05-24 07:29

Updated : 2020-08-24 10:37

NVD link : CVE-2019-12312

Mitre link : CVE-2019-12312

JSON object : View

CWE

CWE-617

Reachable Assertion

CWE-476

NULL Pointer Dereference

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Products Affected

libreswan

libreswan

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