Vulnerability identifier: #VU38415

Vulnerability risk: Medium

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

CVE-ID: CVE-2016-7030

CWE-ID: CWE-255

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeIPA
Other software / Other software solutions

Vendor: freeipa.org

Description

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

FreeIPA uses a default password policy that locks an account after 5 unsuccessful authentication attempts, which allows remote attackers to cause a denial of service by locking out the account in which system services run on.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FreeIPA: 4.6.0

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External links
http://rhn.redhat.com/errata/RHSA-2017-0001.html
http://www.openwall.com/lists/oss-security/2017/01/02/5
http://www.securityfocus.com/bid/94934
http://bugzilla.redhat.com/show_bug.cgi?id=1370493
http://pagure.io/freeipa?id=6f1d927467e7907fd1991f88388d96c67c9bff61

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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.