Operating System:

[Ubuntu]

Published:

12 February 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0519
          USN-4734-1: wpa_supplicant and hostapd vulnerabilities
                             12 February 2021

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           wpa_supplicant
                   hostapd
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-0326 CVE-2020-12695 

Reference:         ASB-2021.0038
                   ESB-2021.0417
                   ESB-2020.4372
                   ESB-2020.4315.2
                   ESB-2020.2733

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4734-1

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USN-4734-1: wpa_supplicant and hostapd vulnerabilities
11 February 2021

Several security issues were fixed in wpa_supplicant and hostapd.
Releases

  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Packages

  o wpa - client support for WPA and WPA2

Details

It was discovered that wpa_supplicant did not properly handle P2P
(Wi-Fi Direct) group information in some situations, leading to a
heap overflow. A physically proximate attacker could use this to cause a
denial of service or possibly execute arbitrary code. ( CVE-2021-0326 )

It was discovered that hostapd did not properly handle UPnP subscribe
messages in some circumstances. An attacker could use this to cause a
denial of service. ( CVE-2020-12695 )

Update instructions

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

Ubuntu 20.10

  o hostapd - 2:2.9-1ubuntu8.1
  o wpasupplicant - 2:2.9-1ubuntu8.1

Ubuntu 20.04

  o hostapd - 2:2.9-1ubuntu4.2
  o wpasupplicant - 2:2.9-1ubuntu4.2

Ubuntu 18.04

  o hostapd - 2:2.6-15ubuntu2.7
  o wpasupplicant - 2:2.6-15ubuntu2.7

Ubuntu 16.04

  o hostapd - 1:2.4-0ubuntu6.7
  o wpasupplicant - 2.4-0ubuntu6.7

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

  o CVE-2021-0326
  o CVE-2020-12695

Related notices

  o USN-4494-1 : gupnp, libgupnp-1.2-0
  o USN-4722-1 : minidlna

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