#VU38872 NULL pointer dereference in Fedora - CVE-2016-5391

Vulnerability identifier: #VU38872

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-5391

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Fedora
Operating systems & Components / Operating system

Vendor: Fedoraproject

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

libreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).

Mitigation
Install update from vendor's website.

Vulnerable software versions

Fedora: 23 - 24

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1356183
https://libreswan.org/security/CVE-2016-5391/CVE-2016-5391.txt
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65R6OA5AY7K2UBQUDOLOS5Y3SCULQI6I/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UKMS7R4TG6LTAGEBOWVUXF6LAWQXLNXV/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.