Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
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
- --------------------------BEGIN INCLUDED TEXT--------------------
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
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQIVAwUBYCXBreNLKJtyKPYoAQiSMQ/+Il6eWTRj5ZrfQlR6d/fss6+MdMherWDr
TKOZly1sYiJiLU2FDoe4qiTlQx58fNjOcPzUZK9KdO/O7TiPxqUlE5WtqHlPlsKC
ofkcUNJc9daJ5x+LbH1cQBw1l0AVf82+od+TYCrJ/CGEQKleuthemdb0FdU1IaJF
HHUZ53nlF3+P3XWeLYMKj+dCmtyZF4OnY24aNaaa3YLHP6AvhzejdOQNbwAboKqJ
pbqfP5o703gucrNhUcN6kOTF5vwjU7hsHIpKKrztqO6vTXDlaFXwxZmF5tbRKWr0
wDCSzFPMV/Px/UunjWWMON5wt+/tKZLrm244VfC34IvftfTeCocf9Xc6tqg+8n+k
lBjLPSoGBZNWrd1def5DIZsM/01my6twLM/PsmueTScDT4CixNc+axMZ15Ee7dlk
oEfzr+gW1MZKZ8V2amLiYo0odzFI1PzV5UR9+zxR0Ho6UV/QIAhW0Y1UDfwj/txn
JBNsYkH2IrNfsp3ryYaLoTsvR9KZIUy9lhn4TNsZeV3eCeAdrW/rG1yfV+to6A22
eJVpaPAKXGSFscb+7KdIH9MJ4qhqHvl8kqwV42giXwceRlWEeu0ezaLRSx/p5UOV
23VYs1JmaJiv6CeoabzF1PEQ1uOrah1ZcCkyck3Fa0ZkNnc7zjrqjsTY8f025S+I
fp1U5fXlwQ0=
=h5Va
-----END PGP SIGNATURE-----