Debian Security Advisory

DSA-4450-1 wpa -- security update

Date Reported:
24 May 2019
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 927463.
In Mitre's CVE dictionary: CVE-2019-11555.
More information:

A vulnerability was found in the WPA protocol implementation found in wpa_supplication (station) and hostapd (access point).

The EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) doesn't properly validate fragmentation reassembly state when receiving an unexpected fragment. This could lead to a process crash due to a NULL pointer derefrence.

An attacker in radio range of a station or access point with EAP-pwd support could cause a crash of the relevant process (wpa_supplicant or hostapd), ensuring a denial of service.

For the stable distribution (stretch), this problem has been fixed in version 2:2.4-1+deb9u4.

We recommend that you upgrade your wpa packages.

For the detailed security status of wpa please refer to its security tracker page at: