Debian DSA-3999-1 : wpa - security update (KRACK)
Medium Nessus Plugin ID 103859
Synopsis
The remote Debian host is missing a security-related update.
Description
Mathy Vanhoef of the imec-DistriNet research group of KU Leuven discovered multiple vulnerabilities in the WPA protocol, used for authentication in wireless networks. Those vulnerabilities apply to both the access point (implemented in hostapd) and the station (implemented in wpa_supplicant).
An attacker exploiting the vulnerabilities could force the vulnerable system to reuse cryptographic session keys, enabling a range of cryptographic attacks against the ciphers used in WPA1 and WPA2.
More information can be found in the researchers's paper, Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2.
- CVE-2017-13077 :
reinstallation of the pairwise key in the Four-way handshake
- CVE-2017-13078 :
reinstallation of the group key in the Four-way handshake
- CVE-2017-13079 :
reinstallation of the integrity group key in the Four-way handshake
- CVE-2017-13080 :
reinstallation of the group key in the Group Key handshake
- CVE-2017-13081 :
reinstallation of the integrity group key in the Group Key handshake
- CVE-2017-13082 :
accepting a retransmitted Fast BSS Transition Reassociation Request and reinstalling the pairwise key while processing it
- CVE-2017-13086 :
reinstallation of the Tunneled Direct-Link Setup (TDLS) PeerKey (TPK) key in the TDLS handshake
- CVE-2017-13087 :
reinstallation of the group key (GTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame
- CVE-2017-13088 :
reinstallation of the integrity group key (IGTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame
Solution
Upgrade the wpa packages.
For the oldstable distribution (jessie), these problems have been fixed in version 2.3-1+deb8u5.
For the stable distribution (stretch), these problems have been fixed in version 2:2.4-1+deb9u1.