hostapd/wpa_supplicant up to 2.7 SAE improper authentication

Summaryinfo

A vulnerability described as problematic has been identified in hostapd and wpa_supplicant up to 2.7. Affected by this vulnerability is an unknown functionality of the component SAE. Executing a manipulation can lead to improper authentication. The identification of this vulnerability is CVE-2019-9496. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in hostapd and wpa_supplicant up to 2.7 and classified as problematic. This vulnerability affects an unknown code block of the component SAE. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect availability. CVE summarizes:

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

The bug was discovered 04/10/2019. The weakness was shared 04/17/2019 (Website). The advisory is available at w1.fi. This vulnerability was named CVE-2019-9496 since 03/01/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277804 (Fedora Security Update for hostapd (FEDORA-2019-d03bae77f5)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-133477, VDB-133476, VDB-133475 and VDB-133472 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• hostapd
• wpa_supplicant

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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CVSSv3info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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