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CVE-2019-9495— The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns

Quick assessment

Affected
Wi-Fi Alliance hostapd with EAP-pwd support
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WPA是美国Wi-Fi联盟（Wi-Fi Alliance）的一套Wi-Fi访问保护方案，包括安全协议和安全认证程序。 WPA中存在安全漏洞。攻击者可利用该漏洞绕过安全限制，执行未授权的操作。

AI Predicted 3.7 Difficulty: Hard EPSS 3.45% · P88
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I. Basic Information for CVE-2019-9495

Vulnerability Information
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Vulnerability Title
The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns
Source: CVE Program / CVE List V5
Vulnerability Description
The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
通过缓存导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
WPA 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WPA是美国Wi-Fi联盟（Wi-Fi Alliance）的一套Wi-Fi访问保护方案，包括安全协议和安全认证程序。 WPA中存在安全漏洞。攻击者可利用该漏洞绕过安全限制，执行未授权的操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wi-Fi Alliance hostapd with EAP-pwd support 2.7 ~ 2.7 -
Wi-Fi Alliance wpa_supplicant with EAP-pwd support 2.7 ~ 2.7 -

II. Public POCs for CVE-2019-9495

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III. Intelligence Information for CVE-2019-9495

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Exploits & Public PoCs for CVE-2019-9495 (1)

Mailing List Discussions for CVE-2019-9495 (4)

Other References for CVE-2019-9495 (3)

Same Patch Batch · Wi-Fi Alliance · 2019-04-17 · 6 CVEs total

CVE-2019-9494 The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side-channel at
CVE-2019-9496 An invalid authentication sequence could result in the hostapd process terminating due to
CVE-2019-9497 The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not va
CVE-2019-9498 The implementations of EAP-PWD in hostapd EAP Server do not validate the scalar and elemen
CVE-2019-9499 The implementations of EAP-PWD in wpa_supplicant EAP Peer do not validate the scalar and e

IV. Related Vulnerabilities

Same product: hostapd with EAP-pwd support
Same vendor: Wi-Fi Alliance
Same weakness: CWE-524

V. Comments for CVE-2019-9495

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