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AUSCERT External Security Bulletin Redistribution
ESB-2021.3044
USN-5074-1: Firefox vulnerabilities
10 September 2021
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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
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-38494 CVE-2021-38493 CVE-2021-38491
Reference: ESB-2021.3000
ESB-2021.2999
Original Bulletin:
https://ubuntu.com/security/notices/USN-5074-1
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USN-5074-1: Firefox vulnerabilities
09 September 2021
Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Releases
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 mixed
content blocking, or execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o firefox - 92.0+build3-0ubuntu0.21.04.1
Ubuntu 20.04
o firefox - 92.0+build3-0ubuntu0.20.04.1
Ubuntu 18.04
o firefox - 92.0+build3-0ubuntu0.18.04.1
After a standard system update you need to restart Firefox to make
all the necessary changes.
References
o CVE-2021-38493
o CVE-2021-38494
o CVE-2021-38491
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