#VU8840 Key management errors in Linux kernel


Published: 2017-10-17 | Updated: 2020-11-11

Vulnerability identifier: #VU8840

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2017-13080

CWE-ID: CWE-320

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows an adjacent attacker to force a supplicant to reinstall a previously used group key.

The weakness exists in the processing of the 802.11i 4-way handshake messages of the WPA and WPA2 protocols due to ambiguities in the processing of associated protocol messages. An adjacent attacker can use man-in-the-middle techniques to retransmit previously used message exchanges between supplicant and authenticator.

The vulnerability is dubbed "KRACK" attack.

Mitigation
Update Linux kernel to version 4.13.14 or 4.9.63.

Vulnerable software versions

Linux kernel: 3.18 - 4.13.13


CPE

External links
http://www.krackattacks.com/
http://papers.mathyvanhoef.com/ccs2017.pdf


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability