w1fi hostapd CVE-2019-9495 vulnerability in W1fi and Other Products
Published on April 17, 2019

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

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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.

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Weakness Type

Use of Cache Containing Sensitive Information

The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere. Applications may use caches to improve efficiency when communicating with remote entities or performing intensive calculations. A cache maintains a pool of objects, threads, connections, pages, financial data, passwords, or other resources to minimize the time it takes to initialize and access these resources. If the cache is accessible to unauthorized actors, attackers can read the cache and obtain this sensitive information.


Products Associated with CVE-2019-9495

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2019-9495 are published in these products:

W1fi Hostapd
 
W1fi Wpa Supplicant
 
Fedora Project Fedora
 
OpenSuse Backports Sle
 
OpenSuse Leap
 
Synology Radius Server
 
Synology Router Manager
 
Debian Linux
 
FreeBSD
 

Affected Versions

Wi-Fi Alliance hostapd with EAP-pwd support: Wi-Fi Alliance wpa_supplicant with EAP-pwd support:

Exploit Probability

EPSS
4.67%
Percentile
89.11%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.