Vulnerability identifier: #VU21741

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2014-2741

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Openfire
Web applications / Modules and components for CMS

Vendor: Ignite Realtime

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in nio/XMLLightweightParser.java when processing XML elements. A remote authenticated attacker can use a specially crafted XMPP stream to consume excessive server resources.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Openfire: 3.9.0 - 3.9.1

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External links
http://www.kb.cert.org/vuls/id/495476
http://xmpp.org/resources/security-notices/uncontrolled-resource-consumption-with-highly-compressed-xmpp-stanzas/
http://openwall.com/lists/oss-security/2014/04/09/1
http://openwall.com/lists/oss-security/2014/04/07/7
http://fisheye.igniterealtime.org/changelog/openfiregit?cs=3aec383e07ee893b77396fe946766bbd3758af77
http://community.igniterealtime.org/thread/52317

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.