Input validation error in libreswan

1) Input validation error

EUVDB-ID: #VU40342

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 - Improper input validation

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:libreswan.org:libreswan:3.16:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:3.16:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*

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

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.