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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.

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Releases

Packages

  • 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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-4734-2: wpasupplicant, wpagui, wpa, wpasupplicant-udeb, hostapd
  • USN-4494-1: gupnp, libgupnp-doc, gir1.2-gupnp-1.2, libgupnp-1.2-dev, libgupnp-1.2-0
  • USN-4722-1: minidlna