Improper Certificate Validation in FreeRADIUS

1) Improper Certificate Validation

EUVDB-ID: #VU32360

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-4680

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

FreeRADIUS 2.2.x before 2.2.8 and 3.0.x before 3.0.9 does not properly check revocation of intermediate CA certificates.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FreeRADIUS: 2.2.0 - 2.2.7

External links

http://lists.opensuse.org/opensuse-security-announce/2017-01/msg00010.html
http://packetstormsecurity.com/files/132415/FreeRADIUS-Insufficient-CRL-Application.html
http://www.ocert.org/advisories/ocert-2015-008.html
http://www.securityfocus.com/archive/1/535810/100/0/threaded
http://www.securityfocus.com/bid/75327
http://www.securitytracker.com/id/1032690
http://bugzilla.redhat.com/show_bug.cgi?id=1234975

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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