Vulnerability identifier: #VU40859

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-1827

CWE-ID: CWE-19

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 service disruption.

The get_user_grouplist function in the extdom plug-in in FreeIPA before 4.1.4 does not properly reallocate memory when processing user accounts, which allows remote attackers to cause a denial of service (crash) via a group list request for a user that belongs to a large number of groups.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Fedora: 21 - 22

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154314.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/154103.html
http://rhn.redhat.com/errata/RHSA-2015-0728.html
http://www.securityfocus.com/bid/73376
http://bugzilla.redhat.com/show_bug.cgi?id=1205200
http://fedorahosted.org/freeipa/ticket/4908

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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.