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AUSCERT External Security Bulletin Redistribution
ESB-2021.0575
USN-4734-2: wpa_supplicant and hostapd vulnerabilities
17 February 2021
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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-2021.0560
ESB-2021.0536
ESB-2021.0519
ESB-2021.0417
Original Bulletin:
https://ubuntu.com/security/notices/USN-4734-2
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USN-4734-2: wpa_supplicant and hostapd vulnerabilities
16 February 2021
Several security issues were fixed in wpa_supplicant and hostapd.
Releases
o Ubuntu 14.04 ESM
Packages
o wpa - client support for WPA and WPA2
Details
USN-4734-1 fixed several vulnerabilities in wpa_supplicant. This
update provides the corresponding update for Ubuntu 14.04 ESM.
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 14.04
o hostapd - 1:2.1-0ubuntu1.7+esm3
o wpasupplicant - 2.1-0ubuntu1.7+esm3
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-4734-1 : wpasupplicant, wpa, hostapd
o USN-4722-1 : minidlna
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