SB2017101703 - Man-in-the-middle in Microsoft Windows WPA/WPA2 Protocol
Published: October 17, 2017
Security Bulletin ID
SB2017101703
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Key management errors (CVE-ID: CVE-2017-13080)
CWE-ID: CWE-320 - Key Management Errors
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
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.
Remediation
Install update from vendor's website.