#VU23611 Expected behavior violation in hostapd - CVE-2019-5062

Vulnerability identifier: #VU23611

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-5062

CWE-ID: CWE-440

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Jouni Malinen

Description

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

The vulnerability exists due to the 802.11w security state handling connected clients with valid 802.11w sessions. A remote attacker on the local network can simulate an incomplete new association, trigger a deauthentication against stations using 802.11w and cause a denial of service condition on the target system.

Note: This vulnerability affects hostapd on a Raspberry Pi.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

hostapd: 2.6

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External links
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0850

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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.