CVE-2019-9495
Publication date 10 April 2019
Last updated 25 August 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| wpa | ||
| 18.04 LTS bionic |
Fixed in 2:2.6-15ubuntu2.2
|
|
| 16.04 LTS xenial |
Fixed in 2.4-0ubuntu6.4
|
|
| 14.04 LTS trusty |
Fixed in 2.1-0ubuntu1.7
|
|
| wpasupplicant | ||
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release |
Severity score breakdown
CVSS version: CVSS v3.0
Base score
3.7 · Low
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
References
Related Ubuntu Security Notices (USN)
- USN-3944-1
- wpa_supplicant and hostapd vulnerabilities
- 10 April 2019