Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.3684
USN-5131-1: Firefox vulnerabilities
4 November 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Firefox
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-38509 CVE-2021-38508 CVE-2021-38507
CVE-2021-38506 CVE-2021-38504 CVE-2021-38503
Reference: ESB-2021.3680
ESB-2021.3678
ESB-2021.3664
ESB-2021.3662
Original Bulletin:
https://ubuntu.com/security/notices/USN-5131-1
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-5131-1: Firefox vulnerabilities
03 November 2021
Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Releases
o Ubuntu 21.10
o Ubuntu 21.04
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o firefox - Mozilla Open Source web browser
Details
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the browser UI, confuse the user, conduct phishing
attacks, or execute arbitrary code. ( CVE-2021-38503 , CVE-2021-38504 ,
CVE-2021-38506 , CVE-2021-38507 , CVE-2021-38508 , CVE-2021-38509 )
It was discovered that the 'Copy Image Link' context menu action
would copy the final image URL after redirects. If a user were tricked
into copying and pasting a link for an embedded image that triggered
authentication flows back to the page, an attacker could potentially
exploit this to steal authentication tokens.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.10
o firefox - 94.0+build3-0ubuntu0.21.10.1
Ubuntu 21.04
o firefox - 94.0+build3-0ubuntu0.21.04.1
Ubuntu 20.04
o firefox - 94.0+build3-0ubuntu0.20.04.1
Ubuntu 18.04
o firefox - 94.0+build3-0ubuntu0.18.04.1
After a standard system update you need to restart Firefox to make
all the necessary changes.
References
o CVE-2021-38507
o CVE-2021-38509
o CVE-2021-38508
o CVE-2021-38503
o CVE-2021-38504
o CVE-2021-38506
- --------------------------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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=QHch
-----END PGP SIGNATURE-----