Denial of service in hostapd

1) Memory corruption

EUVDB-ID: #VU11265

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-5314

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:jouni_malinen:hostapd:2.1:*:*:*:*:*:*:*
• cpe:2.3:a:jouni_malinen:hostapd:2.2:*:*:*:*:*:*:*
• cpe:2.3:a:jouni_malinen:hostapd:2.3:*:*:*:*:*:*:*

External links

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

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).

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.