Multiple vulnerabilities in W1.fi hostapd



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-5062
CVE-2019-5061
CWE-ID CWE-440
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 hostapd
Server applications / Remote access servers, VPN

Vendor Jouni Malinen

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Expected behavior violation

EUVDB-ID: #VU23611

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 - Expected Behavior Violation

Exploit availability: No

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

CPE2.3 External links

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


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.

2) Expected behavior violation

EUVDB-ID: #VU23612

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-2019-5061

CWE-ID: CWE-440 - Expected Behavior Violation

Exploit availability: No

Description

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

The vulnerability exists due to an Authentication and AssociationRequest packet is sent before the station has successfully authenticated. A remote attacker on the local network can iterate through a large set of unique MAC addresses to trigger DoS attacks within the upstream network infrastructure.

This can lead to different denial of service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby Aps of the same wireless infrastructure.

Note: This vulnerability affects hostapd Ubiquiti AP-AC-Pro firmware 4.0.10.9653



Mitigation

Install updates from vendor's website.

Vulnerable software versions

hostapd: 2.6

CPE2.3 External links

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0849


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.



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