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AUSCERT External Security Bulletin Redistribution
ESB-2021.2424
USN-5011-1: Firefox vulnerabilities
19 July 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
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-30547 CVE-2021-29977 CVE-2021-29976
CVE-2021-29975 CVE-2021-29974 CVE-2021-29972
CVE-2021-29970
Reference: ASB-2021.0120
ESB-2021.2422
ESB-2021.2417
ESB-2021.2411
Original Bulletin:
https://ubuntu.com/security/notices/USN-5011-1
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USN-5011-1: Firefox vulnerabilities
16 July 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 20.10
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, overlay text
over another domain, 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 - 90.0+build1-0ubuntu0.21.04.1
Ubuntu 20.10
o firefox - 90.0+build1-0ubuntu0.20.10.1
Ubuntu 20.04
o firefox - 90.0+build1-0ubuntu0.20.04.1
Ubuntu 18.04
o firefox - 90.0+build1-0ubuntu0.18.04.1
After a standard system update you need to restart Firefox to make
all the necessary changes.
References
o CVE-2021-29974
o CVE-2021-29977
o CVE-2021-30547
o CVE-2021-29972
o CVE-2021-29975
o CVE-2021-29976
o CVE-2021-29970
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