Vulnerability identifier: #VU11265

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-5314

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
hostapd
Server applications / Remote access servers, VPN

Vendor: Jouni Malinen

Description
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the eap_pwd_process function due to missing last fragment length validation. An adjacent attacker can submit a large buffer fragment in an EAP-pwd message, trigger memory corruption and cause the service to crash.

Mitigation
Update to version 2.6.

Vulnerable software versions

hostapd: 2.1 - 2.5

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External links
http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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