SB2021040207 - MitM attack in hostapd



SB2021040207 - MitM attack in hostapd

Published: April 2, 2021 Updated: January 17, 2022

Security Bulletin ID SB2021040207
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Input validation error (CVE-ID: CVE-2021-30004)

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to insufficient validation of user-supplied input in tls/pkcs1.c and tls/x509v3.c files in wpa_supplicant and hostapd when handling AlgorithmIdentifier parameters. A remote attacker can pass specially crafted input to the application and perform MitM attack.


Remediation

Install update from vendor's website.