MS-ISAC ADVISORY NUMBER:
2023-136
DATE(S) ISSUED:
11/24/2023
OVERVIEW:
Multiple vulnerabilities have been discovered in Mozilla products, the most severe of which could allow for arbitrary code execution.
Mozilla Firefox is a web browser used to access the Internet.
Mozilla Firefox ESR is a version of the web browser intended to be deployed in large organizations.
Mozilla Thunderbird is an email client.Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.
THREAT INTELLIGENCE:
There are currently no reports of these vulnerabilities being exploited in the wild.
SYSTEMS AFFECTED:
Firefox ESR versions prior to 115.5.0 Thunderbird versions prior to 115.5 Firefox for iOS versions prior to 120 Firefox versions prior to 120
RISK:
Government:
Large and medium government entitiesHIGH
Small governmentMEDIUM
Businesses:
Large and medium business entitiesHIGH
Small business entitiesMEDIUM
Home Users:
LOW
TECHNICAL SUMMARY:
Multiple vulnerabilities have been discovered in Mozilla products, the most severe of which could allow for arbitrary code execution. Details of these vulnerabilities are as follows:Tactic: Initial Access (TA0001):Technique: Drive-by Compromise (T1189)
Clickjacking permission prompts using the fullscreen transition. The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by ..
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