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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0793
           USN-4757-2: wpa_supplicant and hostapd vulnerability
                               5 March 2021

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

Product:           wpa_supplicant
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service               -- Remote/Unauthenticated
                   Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-27803  

Reference:         ESB-2021.0763

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4757-2

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USN-4757-2: wpa_supplicant and hostapd vulnerability
04 March 2021

wpa_supplicant could be made to crash or run programs if it received
specially crafted network traffic.
Releases

  o Ubuntu 14.04 ESM

Packages

  o wpa - client support for WPA and WPA2

Details

USN-4757-1 fixed a vulnerability in wpa_supplicant and hostapd. This update
provides the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that wpa_supplicant did not properly handle P2P
(Wi-Fi Direct) provision discovery requests in some situations. A
physically proximate attacker could use this to cause a denial of service
or possibly execute arbitrary code.

Update instructions

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

Ubuntu 14.04

  o wpasupplicant - 2.1-0ubuntu1.7+esm4

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

References

  o CVE-2021-27803

Related notices

  o USN-4757-1 : wpa, wpasupplicant

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