KLA12336
Multiple vulnerabilities in Mozilla Firefox ESR

Multiple vulnerabilities were found in Mozilla Firefox ESR. Malicious users can exploit these vulnerabilities to obtain sensitive information, spoof user interface, bypass security restrictions, execute arbitrary code, cause denial of service.

Below is a complete list of vulnerabilities:

1. Information disclosure vulnerability in Cloud Clipboard for Windows can be exploited to obtain sensitive information.
2. Security UI vulnerability can be exploited to spoof user interface or obtain sensitive information.
3. Security vulnerability in iframe sandbox rules can be exploited to bypass security restrictions.
4. Code execution vulnerability for MacOS can be exploited via special .inetloc files to execute arbitrary code.
5. Use after free vulnerability in file picker dialog can be exploited to cause denial of service.
6. Security vulnerability can be exploited to bypass security restrictions and spoof user interface.
7. Security bypass vulnerability in HTTP2 can be exploited to bypass security restrictions.
8. Security UI vulnerability in Javascript alert box can be exploited to spoof user interface.

Mozilla Firefox ESR earlier than 91.3

Update to the latest version
Download Firefox ESR

MFSA2021-49