The following updates has been released for Ubuntu Linux:

USN-3937-2: Apache vulnerabilities
USN-3944-1: wpa_supplicant and hostapd vulnerabilities

USN-3937-2: Apache vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3937-2
April 10, 2019

apache2 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Apache.

Software Description:
- apache2: Apache HTTP server

Details:

USN-3937-1 and USN-3627-1 fixed several vulnerabilities in Apache.
This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Simon Kappel discovered that the Apache HTTP Server mod_auth_digest
 module incorrectly handled threads. A remote attacker with valid
 credentials could possibly use this issue to authenticate using
 another username, bypassing access control restrictions.
 (CVE-2019-0217)

 Alex Nichols and Jakob Hirsch discovered that the Apache HTTP Server
 mod_authnz_ldap module incorrectly handled missing charset encoding
 headers. A remote attacker could possibly use this issue to cause the
 server to crash, resulting in a denial of service. (CVE-2017-15710)

 Robert Swiecki discovered that the Apache HTTP Server incorrectly
 handled certain requests. A remote attacker could possibly use this
 issue to cause the server to crash, leading to a denial of service.
 (CVE-2018-1301)

 Nicolas Daniels discovered that the Apache HTTP Server incorrectly
 generated the nonce when creating HTTP Digest authentication
 challenges. A remote attacker could possibly use this issue to replay
 HTTP requests across a cluster of servers.
 (CVE-2018-1312)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  apache2.2-bin 2.2.22-1ubuntu1.15

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3937-2
  https://usn.ubuntu.com/usn/usn-3937-1
  CVE-2017-15710, CVE-2018-1301, CVE-2018-1312, CVE-2019-0217

USN-3944-1: wpa_supplicant and hostapd vulnerabilities

==========================================================================
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