hostapd/wpa_supplicant up to 2.8 SAE/EAP-pwd information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in hostapd and wpa_supplicant up to 2.8. This affects an unknown part of the component SAE/EAP-pwd. Such manipulation leads to information disclosure. This vulnerability is referenced as CVE-2019-13377. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in hostapd and wpa_supplicant up to 2.8. It has been rated as problematic. Affected by this issue is an unknown functionality of the component SAE/EAP-pwd. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

The implementations of SAE and EAP-pwd in hostapd and wpa_supplicant 2.x through 2.8 are vulnerable to side-channel attacks as a result of observable timing differences and cache access patterns when Brainpool curves are used. An attacker may be able to gain leaked information from a side-channel attack that can be used for full password recovery.

The weakness was published 08/15/2019 (Website). The advisory is shared for download at usn.ubuntu.com. This vulnerability is handled as CVE-2019-13377 since 07/07/2019. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592. The advisory points out:

It was discovered that wpa_supplicant and hostapd were vulnerable to a side channel attack against EAP-pwd. A remote attacker could possibly use this issue to recover certain passwords.

Upgrading eliminates this vulnerability.

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Productinfo

Name

• hostapd
• wpa_supplicant

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

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