#VU40342 Input validation error in libreswan and Fedora - CVE-2016-3071

Vulnerability identifier: #VU40342

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-2016-3071

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libreswan
Universal components / Libraries / Libraries used by multiple products
Fedora
Operating systems & Components / Operating system

Vendor: libreswan.org
Fedoraproject

Description

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

Libreswan 3.16 might allow remote attackers to cause a denial of service (daemon restart) via an IKEv2 aes_xcbc transform.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libreswan: 3.16

Fedora: 3.16 - 24

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External links
https://download.libreswan.org/CHANGES
https://lists.fedoraproject.org/pipermail/package-announce/2016-April/182050.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-April/182130.html
https://www.securityfocus.com/bid/87295
https://libreswan.org/security/CVE-2016-3071/CVE-2016-3071.txt

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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.