========================================================================== Ubuntu Security Notice USN-3944-1 April 10, 2019
wpa vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in wpa_supplicant and hostapd. Software Description: - wpa: client support for WPA and WPA2 Details: It was discovered that wpa_supplicant and hostapd were vulnerable to a side channel attack against EAP-pwd. A remote attacker could possibly use this issue to recover certain passwords. (CVE-2019-9495) Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly validated received scalar and element values in EAP-pwd-Commit messages. A remote attacker could possibly use this issue to perform a reflection attack and authenticate without the appropriate password. (CVE-2019-9497, CVE-2019-9498, CVE-2019-9499) It was discovered that hostapd incorrectly handled obtaining random numbers. In rare cases where the urandom device isn't available, it would fall back to using a low-quality PRNG. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10743) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: hostapd 2:2.6-18ubuntu1.1 wpasupplicant 2:2.6-18ubuntu1.1 Ubuntu 18.04 LTS: hostapd 2:2.6-15ubuntu2.2 wpasupplicant 2:2.6-15ubuntu2.2 Ubuntu 16.04 LTS: hostapd 2.4-0ubuntu6.4 wpasupplicant 2.4-0ubuntu6.4 Ubuntu 14.04 LTS: hostapd 2.1-0ubuntu1.7 wpasupplicant 2.1-0ubuntu1.7 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://usn.ubuntu.com/usn/usn-3944-1 CVE-2016-10743, CVE-2019-9495, CVE-2019-9497, CVE-2019-9498, CVE-2019-9499 Package Information: https://launchpad.net/ubuntu/+source/wpa/2:2.6-18ubuntu1.1 https://launchpad.net/ubuntu/+source/wpa/2:2.6-15ubuntu2.2 https://launchpad.net/ubuntu/+source/wpa/2.4-0ubuntu6.4 https://launchpad.net/ubuntu/+source/wpa/2.1-0ubuntu1.7
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